139630636 has 12 divisors (see below), whose sum is σ = 244692112. Its totient is φ = 69718608.

The previous prime is 139630633. The next prime is 139630649. The reversal of 139630636 is 636036931.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 139630595 and 139630604.

It is not an unprimeable number, because it can be changed into a prime (139630633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20880 + ... + 26743.

Almost surely, 2^139630636 is an apocalyptic number.

It is an amenable number.

139630636 is a deficient number, since it is larger than the sum of its proper divisors (105061476).

139630636 is a wasteful number, since it uses less digits than its factorization.

139630636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48360 (or 48358 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 37.

The square root of 139630636 is about 11816.5407797714. The cubic root of 139630636 is about 518.7923602898.

The spelling of 139630636 in words is "one hundred thirty-nine million, six hundred thirty thousand, six hundred thirty-six".