1138899756 has 12 divisors (see below), whose sum is σ = 2657432792. Its totient is φ = 379633248.

The previous prime is 1138899743. The next prime is 1138899757. The reversal of 1138899756 is 6579988311.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1138899696 and 1138899705.

It is not an unprimeable number, because it can be changed into a prime (1138899757) 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, 47454145 + ... + 47454168.

Almost surely, 2^1138899756 is an apocalyptic number.

It is an amenable number.

1138899756 is an abundant number, since it is smaller than the sum of its proper divisors (1518533036).

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

1138899756 is a wasteful number, since it uses less digits than its factorization.

1138899756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94908320 (or 94908318 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 57.

The square root of 1138899756 is about 33747.5888916527. The cubic root of 1138899756 is about 1044.3077475325.

The spelling of 1138899756 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-nine thousand, seven hundred fifty-six".