138845400 has 48 divisors (see below), whose sum is σ = 430422600. Its totient is φ = 37025280.

The previous prime is 138845389. The next prime is 138845401. The reversal of 138845400 is 4548831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138845401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115105 + ... + 116304.

Almost surely, 2^138845400 is an apocalyptic number.

138845400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138845400 is an abundant number, since it is smaller than the sum of its proper divisors (291577200).

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

138845400 is a wasteful number, since it uses less digits than its factorization.

138845400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231428 (or 231419 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 138845400 is about 11783.2677980261. The cubic root of 138845400 is about 517.8180266474.

The spelling of 138845400 in words is "one hundred thirty-eight million, eight hundred forty-five thousand, four hundred".