678263904 has 36 divisors (see below), whose sum is σ = 1928813796. Its totient is φ = 226087872.

The previous prime is 678263857. The next prime is 678263921. The reversal of 678263904 is 409362876.

678263904 is a `hidden beast` number, since 6 + 7 + 8 + 2 + 639 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 678263904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1177254 + ... + 1177829.

It is an arithmetic number, because the mean of its divisors is an integer number (53578161).

Almost surely, 2^678263904 is an apocalyptic number.

It is an amenable number.

678263904 is an abundant number, since it is smaller than the sum of its proper divisors (1250549892).

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

678263904 is a wasteful number, since it uses less digits than its factorization.

678263904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355099 (or 2355088 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 678263904 is about 26043.5002255841. The cubic root of 678263904 is about 878.6169320983.

The spelling of 678263904 in words is "six hundred seventy-eight million, two hundred sixty-three thousand, nine hundred four".