45400644 has 27 divisors (see below), whose sum is σ = 114865023. Its totient is φ = 15120072.

The previous prime is 45400639. The next prime is 45400657. The reversal of 45400644 is 44600454.

The square root of 45400644 is 6738.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×45400644² = 4122436951229472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39867 + ... + 40989.

Almost surely, 2^45400644 is an apocalyptic number.

45400644 is the 6738-th square number.

It is an amenable number.

45400644 is an abundant number, since it is smaller than the sum of its proper divisors (69464379).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45400644 is a wasteful number, since it uses less digits than its factorization.

45400644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The cubic root of 45400644 is about 356.7418042222.

It can be divided in two parts, 45 and 400644, that added together give a square (400689 = 633²).

The spelling of 45400644 in words is "forty-five million, four hundred thousand, six hundred forty-four".