138361580 has 24 divisors (see below), whose sum is σ = 332068128. Its totient is φ = 47438208.

The previous prime is 138361579. The next prime is 138361621. The reversal of 138361580 is 85163831.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 138361580.

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, 494009 + ... + 494288.

It is an arithmetic number, because the mean of its divisors is an integer number (13836172).

Almost surely, 2^138361580 is an apocalyptic number.

138361580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138361580 is an abundant number, since it is smaller than the sum of its proper divisors (193706548).

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

138361580 is a wasteful number, since it uses less digits than its factorization.

138361580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988313 (or 988311 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 138361580 is about 11762.7199235551. The cubic root of 138361580 is about 517.2158646224.

The spelling of 138361580 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, five hundred eighty".