634474778 has 16 divisors (see below), whose sum is σ = 1089953280. Its totient is φ = 271347216.

The previous prime is 634474777. The next prime is 634474783. The reversal of 634474778 is 877474436.

It is not an unprimeable number, because it can be changed into a prime (634474777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40601 + ... + 54012.

It is an arithmetic number, because the mean of its divisors is an integer number (68122080).

Almost surely, 2^634474778 is an apocalyptic number.

634474778 is a deficient number, since it is larger than the sum of its proper divisors (455478502).

634474778 is a wasteful number, since it uses less digits than its factorization.

634474778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95101.

The product of its digits is 3161088, while the sum is 50.

The square root of 634474778 is about 25188.7827812302. The cubic root of 634474778 is about 859.2867612639.

The spelling of 634474778 in words is "six hundred thirty-four million, four hundred seventy-four thousand, seven hundred seventy-eight".