399904911 has 32 divisors (see below), whose sum is σ = 678182400. Its totient is φ = 228147840.

The previous prime is 399904871. The next prime is 399904919. The reversal of 399904911 is 119409993.

It is not a de Polignac number, because 399904911 - 2⁶ = 399904847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399904919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151975 + ... + 154583.

It is an arithmetic number, because the mean of its divisors is an integer number (21193200).

Almost surely, 2^399904911 is an apocalyptic number.

399904911 is a deficient number, since it is larger than the sum of its proper divisors (278277489).

399904911 is a wasteful number, since it uses less digits than its factorization.

399904911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436 (or 3430 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 399904911 is about 19997.6226337032. The cubic root of 399904911 is about 736.7479099558.

The spelling of 399904911 in words is "three hundred ninety-nine million, nine hundred four thousand, nine hundred eleven".