634281372 has 18 divisors (see below), whose sum is σ = 1603322448. Its totient is φ = 211427112.

The previous prime is 634281371. The next prime is 634281379. The reversal of 634281372 is 273182436.

It is a happy number.

634281372 is a `hidden beast` number, since 6 + 3 + 4 + 281 + 372 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 17618927 = 634281372 / (6 + 3 + 4 + 2 + 8 + 1 + 3 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634281371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8809428 + ... + 8809499.

Almost surely, 2^634281372 is an apocalyptic number.

It is an amenable number.

634281372 is an abundant number, since it is smaller than the sum of its proper divisors (969041076).

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

634281372 is a wasteful number, since it uses less digits than its factorization.

634281372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17618937 (or 17618932 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 634281372 is about 25184.9433590787. The cubic root of 634281372 is about 859.1994406902.

The spelling of 634281372 in words is "six hundred thirty-four million, two hundred eighty-one thousand, three hundred seventy-two".