634451904 has 84 divisors (see below), whose sum is σ = 1822347384. Its totient is φ = 211041792.

The previous prime is 634451903. The next prime is 634451927. The reversal of 634451904 is 409154436.

634451904 is a `hidden beast` number, since 634 + 4 + 5 + 19 + 0 + 4 = 666.

634451904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634451903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389139 + ... + 390765.

Almost surely, 2^634451904 is an apocalyptic number.

634451904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634451904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911173692).

634451904 is an abundant number, since it is smaller than the sum of its proper divisors (1187895480).

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

634451904 is a wasteful number, since it uses less digits than its factorization.

634451904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 634451904 is about 25188.3287258206. The cubic root of 634451904 is about 859.2764348426.

The spelling of 634451904 in words is "six hundred thirty-four million, four hundred fifty-one thousand, nine hundred four".