634640036 has 6 divisors (see below), whose sum is σ = 1110620070. Its totient is φ = 317320016.

The previous prime is 634640003. The next prime is 634640059. The reversal of 634640036 is 630046436.

It can be written as a sum of positive squares in only one way, i.e., 550183936 + 84456100 = 23456^2 + 9190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 634639984 and 634640011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79330001 + ... + 79330008.

It is an arithmetic number, because the mean of its divisors is an integer number (185103345).

Almost surely, 2^634640036 is an apocalyptic number.

It is an amenable number.

634640036 is a deficient number, since it is larger than the sum of its proper divisors (475980034).

634640036 is a wasteful number, since it uses less digits than its factorization.

634640036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158660013 (or 158660011 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 634640036 is about 25192.0629564155. The cubic root of 634640036 is about 859.3613592828.

It can be divided in two parts, 6346400 and 36, that added together give a palindrome (6346436).

The spelling of 634640036 in words is "six hundred thirty-four million, six hundred forty thousand, thirty-six".