1138938432 has 56 divisors (see below), whose sum is σ = 3172053600. Its totient is φ = 359663616.

The previous prime is 1138938397. The next prime is 1138938461. The reversal of 1138938432 is 2348398311.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152457 + ... + 159752.

Almost surely, 2^1138938432 is an apocalyptic number.

1138938432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1138938432 is an abundant number, since it is smaller than the sum of its proper divisors (2033115168).

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

1138938432 is a wasteful number, since it uses less digits than its factorization.

1138938432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312243 (or 312233 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1138938432 is about 33748.1619055023. The cubic root of 1138938432 is about 1044.3195686458.

The spelling of 1138938432 in words is "one billion, one hundred thirty-eight million, nine hundred thirty-eight thousand, four hundred thirty-two".