1138907770 has 64 divisors (see below), whose sum is σ = 2752517376. Its totient is φ = 327674880.

The previous prime is 1138907723. The next prime is 1138907789. The reversal of 1138907770 is 777098311.

It is a super-2 number, since 2×1138907770² = 2594221817132745800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46879 + ... + 66898.

It is an arithmetic number, because the mean of its divisors is an integer number (43008084).

Almost surely, 2^1138907770 is an apocalyptic number.

1138907770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1138907770 is an abundant number, since it is smaller than the sum of its proper divisors (1613609606).

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

1138907770 is a wasteful number, since it uses less digits than its factorization.

1138907770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113815.

The product of its (nonzero) digits is 74088, while the sum is 43.

The square root of 1138907770 is about 33747.7076258522. The cubic root of 1138907770 is about 1044.3101969909.

The spelling of 1138907770 in words is "one billion, one hundred thirty-eight million, nine hundred seven thousand, seven hundred seventy".