139569808 has 80 divisors (see below), whose sum is σ = 323729280. Its totient is φ = 57028608.

The previous prime is 139569799. The next prime is 139569811. The reversal of 139569808 is 808965931.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314835 + ... + 315277.

It is an arithmetic number, because the mean of its divisors is an integer number (4046616).

Almost surely, 2^139569808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139569808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161864640).

139569808 is an abundant number, since it is smaller than the sum of its proper divisors (184159472).

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

139569808 is a wasteful number, since it uses less digits than its factorization.

139569808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 139569808 is about 11813.9666496905. The cubic root of 139569808 is about 518.7170146346.

The spelling of 139569808 in words is "one hundred thirty-nine million, five hundred sixty-nine thousand, eight hundred eight".