1138874931 has 32 divisors (see below), whose sum is σ = 1844121600. Its totient is φ = 691528320.

The previous prime is 1138874929. The next prime is 1138874939. The reversal of 1138874931 is 1394788311.

It is not a de Polignac number, because 1138874931 - 2¹ = 1138874929 is a prime.

It is a super-2 number, since 2×1138874931² = 2594072216920509522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1138874939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25791 + ... + 54248.

It is an arithmetic number, because the mean of its divisors is an integer number (57628800).

Almost surely, 2^1138874931 is an apocalyptic number.

1138874931 is a deficient number, since it is larger than the sum of its proper divisors (705246669).

1138874931 is a wasteful number, since it uses less digits than its factorization.

1138874931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80096 (or 80090 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1138874931 is about 33747.2210855946. The cubic root of 1138874931 is about 1044.3001597625.

The spelling of 1138874931 in words is "one billion, one hundred thirty-eight million, eight hundred seventy-four thousand, nine hundred thirty-one".