398777904 has 200 divisors, whose sum is σ = 1334155680. Its totient is φ = 112637952.

The previous prime is 398777861. The next prime is 398777941. The reversal of 398777904 is 409777893.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1024942 + ... + 1025330.

Almost surely, 2^398777904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398777904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667077840).

398777904 is an abundant number, since it is smaller than the sum of its proper divisors (935377776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398777904 is a wasteful number, since it uses less digits than its factorization.

398777904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The square root of 398777904 is about 19969.4242280542. The cubic root of 398777904 is about 736.0551608784.

The spelling of 398777904 in words is "three hundred ninety-eight million, seven hundred seventy-seven thousand, nine hundred four".