138427572 has 12 divisors (see below), whose sum is σ = 322997696. Its totient is φ = 46142520.

The previous prime is 138427567. The next prime is 138427607. The reversal of 138427572 is 275724831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 138427572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5767804 + ... + 5767827.

Almost surely, 2^138427572 is an apocalyptic number.

138427572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138427572 is an abundant number, since it is smaller than the sum of its proper divisors (184570124).

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

138427572 is a wasteful number, since it uses less digits than its factorization.

138427572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11535638 (or 11535636 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 138427572 is about 11765.5247226802. The cubic root of 138427572 is about 517.2980808087.

The spelling of 138427572 in words is "one hundred thirty-eight million, four hundred twenty-seven thousand, five hundred seventy-two".