63139356 has 72 divisors (see below), whose sum is σ = 192017280. Its totient is φ = 17089056.

The previous prime is 63139339. The next prime is 63139357. The reversal of 63139356 is 65393136.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 63139356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63139357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1806 + ... + 11381.

Almost surely, 2^63139356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63139356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96008640).

63139356 is an abundant number, since it is smaller than the sum of its proper divisors (128877924).

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

63139356 is a wasteful number, since it uses less digits than its factorization.

63139356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13223 (or 13218 counting only the distinct ones).

The product of its digits is 43740, while the sum is 36.

The square root of 63139356 is about 7946.0276868382. The cubic root of 63139356 is about 398.1988938809.

The spelling of 63139356 in words is "sixty-three million, one hundred thirty-nine thousand, three hundred fifty-six".