634149252 has 72 divisors (see below), whose sum is σ = 1751480640. Its totient is φ = 191862720.

The previous prime is 634149221. The next prime is 634149281. The reversal of 634149252 is 252941436.

It is a happy number.

634149252 is a `hidden beast` number, since 634 + 14 + 9 + 2 + 5 + 2 = 666.

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

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 486033 + ... + 487335.

It is an arithmetic number, because the mean of its divisors is an integer number (24326120).

Almost surely, 2^634149252 is an apocalyptic number.

It is an amenable number.

634149252 is an abundant number, since it is smaller than the sum of its proper divisors (1117331388).

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

634149252 is a wasteful number, since it uses less digits than its factorization.

634149252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553 (or 2548 counting only the distinct ones).

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

The square root of 634149252 is about 25182.3202266987. The cubic root of 634149252 is about 859.1397798321.

The spelling of 634149252 in words is "six hundred thirty-four million, one hundred forty-nine thousand, two hundred fifty-two".