39904867 has 4 divisors (see below), whose sum is σ = 39922920. Its totient is φ = 39886816.

The previous prime is 39904861. The next prime is 39904871. The reversal of 39904867 is 76840993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39904867 - 2³ = 39904859 is a prime.

It is a super-3 number, since 3×39904867³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (39904861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5158 + ... + 10315.

It is an arithmetic number, because the mean of its divisors is an integer number (9980730).

Almost surely, 2^39904867 is an apocalyptic number.

39904867 is the 5158-th pentagonal number.

39904867 is a deficient number, since it is larger than the sum of its proper divisors (18053).

39904867 is a wasteful number, since it uses less digits than its factorization.

39904867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18052.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 39904867 is about 6317.0299191946. The cubic root of 39904867 is about 341.7238488734.

The spelling of 39904867 in words is "thirty-nine million, nine hundred four thousand, eight hundred sixty-seven".