39918845 has 8 divisors (see below), whose sum is σ = 48190464. Its totient is φ = 31743184.

The previous prime is 39918841. The next prime is 39918847. The reversal of 39918845 is 54881993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39918845 - 2² = 39918841 is a prime.

It is a super-2 number, since 2×39918845² = 3187028372268050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39918845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39918841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23069 + ... + 24738.

It is an arithmetic number, because the mean of its divisors is an integer number (6023808).

Almost surely, 2^39918845 is an apocalyptic number.

It is an amenable number.

39918845 is a deficient number, since it is larger than the sum of its proper divisors (8271619).

39918845 is a wasteful number, since it uses less digits than its factorization.

39918845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47979.

The product of its digits is 311040, while the sum is 47.

The square root of 39918845 is about 6318.1361966960. The cubic root of 39918845 is about 341.7637442437.

The spelling of 39918845 in words is "thirty-nine million, nine hundred eighteen thousand, eight hundred forty-five".