138560884 has 48 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 53796960.

The previous prime is 138560881. The next prime is 138560941. The reversal of 138560884 is 488065831.

It is a super-2 number, since 2×138560884² = 38398237149722912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138560884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138560881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116139 + ... + 117325.

It is an arithmetic number, because the mean of its divisors is an integer number (6320160).

Almost surely, 2^138560884 is an apocalyptic number.

138560884 is a gapful number since it is divisible by the number (14) 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 138560884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151683840).

138560884 is an abundant number, since it is smaller than the sum of its proper divisors (164806796).

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

138560884 is a wasteful number, since it uses less digits than its factorization.

138560884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 138560884 is about 11771.1887250184. The cubic root of 138560884 is about 517.4640879962.

The spelling of 138560884 in words is "one hundred thirty-eight million, five hundred sixty thousand, eight hundred eighty-four".