139561008 has 80 divisors (see below), whose sum is σ = 377690112. Its totient is φ = 44352000.

The previous prime is 139560991. The next prime is 139561013. The reversal of 139561008 is 800165931.

It is a self number, because there is not a number n which added to its sum of digits gives 139561008.

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, 104988 + ... + 106308.

Almost surely, 2^139561008 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 139561008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188845056).

139561008 is an abundant number, since it is smaller than the sum of its proper divisors (238129104).

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

139561008 is a wasteful number, since it uses less digits than its factorization.

139561008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 139561008 is about 11813.5942032897. The cubic root of 139561008 is about 518.7061125498.

The spelling of 139561008 in words is "one hundred thirty-nine million, five hundred sixty-one thousand, eight".