634072986 has 24 divisors (see below), whose sum is σ = 1376784864. Its totient is φ = 210902280.

The previous prime is 634072951. The next prime is 634072991. The reversal of 634072986 is 689270436.

634072986 is a `hidden beast` number, since 634 + 0 + 7 + 2 + 9 + 8 + 6 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 29310 + ... + 46121.

It is an arithmetic number, because the mean of its divisors is an integer number (57366036).

Almost surely, 2^634072986 is an apocalyptic number.

634072986 is an abundant number, since it is smaller than the sum of its proper divisors (742711878).

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

634072986 is a wasteful number, since it uses less digits than its factorization.

634072986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75906 (or 75903 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 634072986 is about 25180.8059044980. The cubic root of 634072986 is about 859.1053369512.

The spelling of 634072986 in words is "six hundred thirty-four million, seventy-two thousand, nine hundred eighty-six".