138458432 has 28 divisors (see below), whose sum is σ = 314004960. Its totient is φ = 59339136.

The previous prime is 138458417. The next prime is 138458447. The reversal of 138458432 is 234854831.

It is a happy number.

138458432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138458417) and next prime (138458447).

It is a tau number, because it is divible by the number of its divisors (28).

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, 154082 + ... + 154977.

Almost surely, 2^138458432 is an apocalyptic number.

It is an amenable number.

138458432 is an abundant number, since it is smaller than the sum of its proper divisors (175546528).

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

138458432 is an equidigital number, since it uses as much as digits as its factorization.

138458432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309078 (or 309068 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 138458432 is about 11766.8361083173. The cubic root of 138458432 is about 517.3365187981.

The spelling of 138458432 in words is "one hundred thirty-eight million, four hundred fifty-eight thousand, four hundred thirty-two".