45039878 has 16 divisors (see below), whose sum is σ = 74724720. Its totient is φ = 20225376.

The previous prime is 45039857. The next prime is 45039881. The reversal of 45039878 is 87893054.

It is a super-2 number, since 2×45039878² = 4057181220509768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22448 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (4670295).

Almost surely, 2^45039878 is an apocalyptic number.

45039878 is a deficient number, since it is larger than the sum of its proper divisors (29684842).

45039878 is a wasteful number, since it uses less digits than its factorization.

45039878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46871.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 45039878 is about 6711.1756049145. The cubic root of 45039878 is about 355.7943674214.

The spelling of 45039878 in words is "forty-five million, thirty-nine thousand, eight hundred seventy-eight".