138568570 has 64 divisors (see below), whose sum is σ = 295488000. Its totient is φ = 46757760.

The previous prime is 138568541. The next prime is 138568571. The reversal of 138568570 is 75865831.

It is not an unprimeable number, because it can be changed into a prime (138568571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243246 + ... + 243814.

It is an arithmetic number, because the mean of its divisors is an integer number (4617000).

Almost surely, 2^138568570 is an apocalyptic number.

138568570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138568570 is an abundant number, since it is smaller than the sum of its proper divisors (156919430).

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

138568570 is an equidigital number, since it uses as much as digits as its factorization.

138568570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 138568570 is about 11771.5151955897. The cubic root of 138568570 is about 517.4736557649.

The spelling of 138568570 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, five hundred seventy".