1138724964 has 72 divisors (see below), whose sum is σ = 3115694400. Its totient is φ = 348587712.

The previous prime is 1138724947. The next prime is 1138724971. The reversal of 1138724964 is 4694278311.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87019 + ... + 99245.

Almost surely, 2^1138724964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138724964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557847200).

1138724964 is an abundant number, since it is smaller than the sum of its proper divisors (1976969436).

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

1138724964 is a wasteful number, since it uses less digits than its factorization.

1138724964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12449 (or 12444 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1138724964 is about 33744.9990961624. Note that the first 3 decimals coincide. The cubic root of 1138724964 is about 1044.2543199509.

The spelling of 1138724964 in words is "one billion, one hundred thirty-eight million, seven hundred twenty-four thousand, nine hundred sixty-four".