Properties of the Number 7400

Seven Thousand Four Hundred

Basics

Value: 7399 → 7400 → 7401

Parity: even

Prime: No

Previous Prime: 7393

Next Prime: 7411

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 5 ² × 37

Divisors: 1, 2, 4, 5, 8, 10, 20, 25, 37, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1110011101000

Octal: 16350

Duodecimal: 4348

Hexadecimal: 1ce8

Square: 54760000

Square Root: 86.02325267042627

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers n such that the decimal expansions of both n and n² have 0 as smallest digit and 7 as largest digit. A256634

a(n) = n*(n + 1)*(n² - 3·n + 5)/6. A6484

Even octagonal numbers: a(n) = 4·n*(3·n-1). A14642

Numbers k such that the decimal expansion of k! begins with k. A33147

Shifts 2 places left when e.g.f. is squared. A7558

a(n) = (11·n² - 7·n)/2. A180223

Bi-unitary weird numbers: bi-unitary abundant numbers (A292982) that are not bi-unitary pseudoperfect (A292985). A292986

Infinitary weird numbers: infinitary abundant numbers (A129656) that are not infinitary pseudoperfect numbers (A306983). A306984

Number of nX2 0..1 arrays with every element unequal to 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero. A304013

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero. A304019