1239138232 has 8 divisors (see below), whose sum is σ = 2323384200. Its totient is φ = 619569112.

The previous prime is 1239138161. The next prime is 1239138233. The reversal of 1239138232 is 2328319321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239138233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77446132 + ... + 77446147.

It is an arithmetic number, because the mean of its divisors is an integer number (290423025).

Almost surely, 2^1239138232 is an apocalyptic number.

It is an amenable number.

1239138232 is a deficient number, since it is larger than the sum of its proper divisors (1084245968).

1239138232 is a wasteful number, since it uses less digits than its factorization.

1239138232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154892285 (or 154892281 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 1239138232 is about 35201.3953132543. The cubic root of 1239138232 is about 1074.0881344654.

The spelling of 1239138232 in words is "one billion, two hundred thirty-nine million, one hundred thirty-eight thousand, two hundred thirty-two".