634806420 has 48 divisors (see below), whose sum is σ = 1818801600. Its totient is φ = 165344256.

The previous prime is 634806409. The next prime is 634806427. The reversal of 634806420 is 24608436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634806427) 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 15 ways as a sum of consecutive naturals, for example, 120445 + ... + 125604.

It is an arithmetic number, because the mean of its divisors is an integer number (37891700).

Almost surely, 2^634806420 is an apocalyptic number.

634806420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634806420 is an abundant number, since it is smaller than the sum of its proper divisors (1183995180).

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

634806420 is a wasteful number, since it uses less digits than its factorization.

634806420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246104 (or 246102 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 634806420 is about 25195.3650499452. The cubic root of 634806420 is about 859.4364525003.

The spelling of 634806420 in words is "six hundred thirty-four million, eight hundred six thousand, four hundred twenty".