138562580 has 192 divisors, whose sum is σ = 365783040. Its totient is φ = 43524096.

The previous prime is 138562579. The next prime is 138562643. The reversal of 138562580 is 85265831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2948117 + ... + 2948163.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^138562580 is an apocalyptic number.

138562580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138562580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182891520).

138562580 is an abundant number, since it is smaller than the sum of its proper divisors (227220460).

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

138562580 is a wasteful number, since it uses less digits than its factorization.

138562580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 138562580 is about 11771.2607651007. The cubic root of 138562580 is about 517.4661992595.

The spelling of 138562580 in words is "one hundred thirty-eight million, five hundred sixty-two thousand, five hundred eighty".