138454528 has 40 divisors (see below), whose sum is σ = 292929912. Its totient is φ = 65150976.

The previous prime is 138454517. The next prime is 138454553. The reversal of 138454528 is 825454831.

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, 751 + ... + 16657.

Almost surely, 2^138454528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138454528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146464956).

138454528 is an abundant number, since it is smaller than the sum of its proper divisors (154475384).

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

138454528 is an equidigital number, since it uses as much as digits as its factorization.

138454528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15942 (or 15926 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 138454528 is about 11766.6702171855. The cubic root of 138454528 is about 517.3316564464.

The spelling of 138454528 in words is "one hundred thirty-eight million, four hundred fifty-four thousand, five hundred twenty-eight".