402319904 has 24 divisors (see below), whose sum is σ = 905220288. Its totient is φ = 172422720.

The previous prime is 402319849. The next prime is 402319919. The reversal of 402319904 is 409913204.

It is a happy number.

It is a super-2 number, since 2×402319904² = 323722610309138432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897812 + ... + 898259.

It is an arithmetic number, because the mean of its divisors is an integer number (37717512).

Almost surely, 2^402319904 is an apocalyptic number.

It is an amenable number.

402319904 is an abundant number, since it is smaller than the sum of its proper divisors (502900384).

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

402319904 is a wasteful number, since it uses less digits than its factorization.

402319904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796088 (or 1796080 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 402319904 is about 20057.9137499392. The cubic root of 402319904 is about 738.2279880115.

The spelling of 402319904 in words is "four hundred two million, three hundred nineteen thousand, nine hundred four".