636157434 has 16 divisors (see below), whose sum is σ = 1387980000. Its totient is φ = 192774960.

The previous prime is 636157421. The next prime is 636157441. The reversal of 636157434 is 434751636.

It is a junction number, because it is equal to n+sod(n) for n = 636157392 and 636157401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4819309 + ... + 4819440.

It is an arithmetic number, because the mean of its divisors is an integer number (86748750).

Almost surely, 2^636157434 is an apocalyptic number.

636157434 is an abundant number, since it is smaller than the sum of its proper divisors (751822566).

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

636157434 is a wasteful number, since it uses less digits than its factorization.

636157434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638765.

The product of its digits is 181440, while the sum is 39.

The square root of 636157434 is about 25222.1615647827. The cubic root of 636157434 is about 860.0457132723.

The spelling of 636157434 in words is "six hundred thirty-six million, one hundred fifty-seven thousand, four hundred thirty-four".