634878404 has 12 divisors (see below), whose sum is σ = 1121824704. Its totient is φ = 314357064.

The previous prime is 634878403. The next prime is 634878427. The reversal of 634878404 is 404878436.

It is not an unprimeable number, because it can be changed into a prime (634878403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770072 + ... + 770895.

It is an arithmetic number, because the mean of its divisors is an integer number (93485392).

Almost surely, 2^634878404 is an apocalyptic number.

It is an amenable number.

634878404 is a deficient number, since it is larger than the sum of its proper divisors (486946300).

634878404 is a wasteful number, since it uses less digits than its factorization.

634878404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541074 (or 1541072 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The square root of 634878404 is about 25196.7935261612. The cubic root of 634878404 is about 859.4689365949.

The spelling of 634878404 in words is "six hundred thirty-four million, eight hundred seventy-eight thousand, four hundred four".