139498568 has 32 divisors (see below), whose sum is σ = 287280000. Its totient is φ = 62976960.

The previous prime is 139498561. The next prime is 139498577. The reversal of 139498568 is 865894931.

It is not an unprimeable number, because it can be changed into a prime (139498561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7793 + ... + 18431.

It is an arithmetic number, because the mean of its divisors is an integer number (8977500).

Almost surely, 2^139498568 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 139498568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143640000).

139498568 is an abundant number, since it is smaller than the sum of its proper divisors (147781432).

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

139498568 is a wasteful number, since it uses less digits than its factorization.

139498568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805 (or 10801 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 139498568 is about 11810.9511894682. The cubic root of 139498568 is about 518.6287441370.

The spelling of 139498568 in words is "one hundred thirty-nine million, four hundred ninety-eight thousand, five hundred sixty-eight".