1138363656 has 64 divisors (see below), whose sum is σ = 3144355200. Its totient is φ = 341603328.

The previous prime is 1138363637. The next prime is 1138363657. The reversal of 1138363656 is 6563638311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1138363657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51271 + ... + 70038.

It is an arithmetic number, because the mean of its divisors is an integer number (49130550).

Almost surely, 2^1138363656 is an apocalyptic number.

It is an amenable number.

1138363656 is an abundant number, since it is smaller than the sum of its proper divisors (2005991544).

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

1138363656 is a wasteful number, since it uses less digits than its factorization.

1138363656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121358 (or 121354 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 1138363656 is about 33739.6451670731. The cubic root of 1138363656 is about 1044.1438638521.

The spelling of 1138363656 in words is "one billion, one hundred thirty-eight million, three hundred sixty-three thousand, six hundred fifty-six".