1138636756 has 12 divisors (see below), whose sum is σ = 1995029568. Its totient is φ = 568628312.

The previous prime is 1138636747. The next prime is 1138636757. The reversal of 1138636756 is 6576368311.

It is a super-2 number, since 2×1138636756² = 2592987324228407072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138636757) 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, 168796 + ... + 175411.

It is an arithmetic number, because the mean of its divisors is an integer number (166252464).

Almost surely, 2^1138636756 is an apocalyptic number.

It is an amenable number.

1138636756 is a deficient number, since it is larger than the sum of its proper divisors (856392812).

1138636756 is a wasteful number, since it uses less digits than its factorization.

1138636756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345038 (or 345036 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 1138636756 is about 33743.6920920044. The cubic root of 1138636756 is about 1044.2273558854.

The spelling of 1138636756 in words is "one billion, one hundred thirty-eight million, six hundred thirty-six thousand, seven hundred fifty-six".