634939884 has 120 divisors (see below), whose sum is σ = 1703283120. Its totient is φ = 206198784.

The previous prime is 634939867. The next prime is 634939897. The reversal of 634939884 is 488939436.

It is a happy number.

634939884 is a `hidden beast` number, since 63 + 493 + 98 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 634939884.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2796979 + ... + 2797205.

It is an arithmetic number, because the mean of its divisors is an integer number (14194026).

Almost surely, 2^634939884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634939884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851641560).

634939884 is an abundant number, since it is smaller than the sum of its proper divisors (1068343236).

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

634939884 is a wasteful number, since it uses less digits than its factorization.

634939884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 418 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 634939884 is about 25198.0134931308. The cubic root of 634939884 is about 859.4966786235.

The spelling of 634939884 in words is "six hundred thirty-four million, nine hundred thirty-nine thousand, eight hundred eighty-four".