138876570 has 96 divisors (see below), whose sum is σ = 436969728. Its totient is φ = 29873664.

The previous prime is 138876547. The next prime is 138876593. The reversal of 138876570 is 75678831.

138876570 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 76 + 570 = 666.

It is an interprime number because it is at equal distance from previous prime (138876547) and next prime (138876593).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4227 + ... + 17193.

It is an arithmetic number, because the mean of its divisors is an integer number (4551768).

Almost surely, 2^138876570 is an apocalyptic number.

138876570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138876570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218484864).

138876570 is an abundant number, since it is smaller than the sum of its proper divisors (298093158).

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

138876570 is a wasteful number, since it uses less digits than its factorization.

138876570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13004 (or 13001 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 138876570 is about 11784.5903619939. The cubic root of 138876570 is about 517.8567728121.

The spelling of 138876570 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, five hundred seventy".