45139718 has 32 divisors (see below), whose sum is σ = 76174560. Its totient is φ = 19918080.

The previous prime is 45139711. The next prime is 45139733. The reversal of 45139718 is 81793154.

It is a super-2 number, since 2×45139718² = 4075188282239048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) 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 not an unprimeable number, because it can be changed into a prime (45139711) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 98546 + ... + 99002.

It is an arithmetic number, because the mean of its divisors is an integer number (2380455).

Almost surely, 2^45139718 is an apocalyptic number.

45139718 is a deficient number, since it is larger than the sum of its proper divisors (31034842).

45139718 is a wasteful number, since it uses less digits than its factorization.

45139718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632.

The product of its digits is 30240, while the sum is 38.

The square root of 45139718 is about 6718.6098264448. The cubic root of 45139718 is about 356.0570701336.

The spelling of 45139718 in words is "forty-five million, one hundred thirty-nine thousand, seven hundred eighteen".