138134240 has 48 divisors (see below), whose sum is σ = 327054672. Its totient is φ = 55133184.

The previous prime is 138134239. The next prime is 138134257. The reversal of 138134240 is 42431831.

It is a congruent number.

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, 125372 + ... + 126468.

It is an arithmetic number, because the mean of its divisors is an integer number (6813639).

Almost surely, 2^138134240 is an apocalyptic number.

138134240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138134240 is an abundant number, since it is smaller than the sum of its proper divisors (188920432).

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

138134240 is a wasteful number, since it uses less digits than its factorization.

138134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 138134240 is about 11753.0523694911. The cubic root of 138134240 is about 516.9324325848.

The spelling of 138134240 in words is "one hundred thirty-eight million, one hundred thirty-four thousand, two hundred forty".