138459060 has 72 divisors (see below), whose sum is σ = 421051176. Its totient is φ = 36829440.

The previous prime is 138459059. The next prime is 138459071. The reversal of 138459060 is 60954831.

138459060 is a `hidden beast` number, since 1 + 3 + 8 + 4 + 590 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 138015504 = 666^2 + 11748^2 .

It is a super-2 number, since 2×138459060² = 38341822592167200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99570 + ... + 100950.

It is an arithmetic number, because the mean of its divisors is an integer number (5847933).

Almost surely, 2^138459060 is an apocalyptic number.

138459060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138459060 is an abundant number, since it is smaller than the sum of its proper divisors (282592116).

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

138459060 is a wasteful number, since it uses less digits than its factorization.

138459060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 138459060 is about 11766.8627934552. The cubic root of 138459060 is about 517.3373009506.

The spelling of 138459060 in words is "one hundred thirty-eight million, four hundred fifty-nine thousand, sixty".