45056778 has 32 divisors (see below), whose sum is σ = 100396800. Its totient is φ = 13384896.

The previous prime is 45056773. The next prime is 45056779. The reversal of 45056778 is 87765054.

It is a super-2 number, since 2×45056778² = 4060226487482568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45056773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7698 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (3137400).

Almost surely, 2^45056778 is an apocalyptic number.

45056778 is an abundant number, since it is smaller than the sum of its proper divisors (55340022).

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

45056778 is a wasteful number, since it uses less digits than its factorization.

45056778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966.

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 45056778 is about 6712.4345806868. The cubic root of 45056778 is about 355.8388626049.

The spelling of 45056778 in words is "forty-five million, fifty-six thousand, seven hundred seventy-eight".