39900891 has 8 divisors (see below), whose sum is σ = 54205200. Its totient is φ = 26098592.

The previous prime is 39900881. The next prime is 39900899. The reversal of 39900891 is 19800993.

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 39900891 - 2¹¹ = 39898843 is a prime.

It is a super-2 number, since 2×39900891² = 3184162205187762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39900899) 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, 125316 + ... + 125633.

It is an arithmetic number, because the mean of its divisors is an integer number (6775650).

Almost surely, 2^39900891 is an apocalyptic number.

39900891 is a deficient number, since it is larger than the sum of its proper divisors (14304309).

39900891 is a wasteful number, since it uses less digits than its factorization.

39900891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251005.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 39900891 is about 6316.7152064978. The cubic root of 39900891 is about 341.7124990535.

The spelling of 39900891 in words is "thirty-nine million, nine hundred thousand, eight hundred ninety-one".