634704020 has 12 divisors (see below), whose sum is σ = 1332878484. Its totient is φ = 253881600.

The previous prime is 634704019. The next prime is 634704029. The reversal of 634704020 is 20407436.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 411440656 + 223263364 = 20284^2 + 14942^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634704029) 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 3 ways as a sum of consecutive naturals, for example, 15867581 + ... + 15867620.

It is an arithmetic number, because the mean of its divisors is an integer number (111073207).

Almost surely, 2^634704020 is an apocalyptic number.

It is an amenable number.

634704020 is an abundant number, since it is smaller than the sum of its proper divisors (698174464).

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

634704020 is a wasteful number, since it uses less digits than its factorization.

634704020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31735210 (or 31735208 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 634704020 is about 25193.3328481962. The cubic root of 634704020 is about 859.3902383987.

The spelling of 634704020 in words is "six hundred thirty-four million, seven hundred four thousand, twenty".