139968528 has 40 divisors (see below), whose sum is σ = 413241408. Its totient is φ = 39990912.

The previous prime is 139968523. The next prime is 139968533. The reversal of 139968528 is 825869931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139968523) and next prime (139968533).

It is not an unprimeable number, because it can be changed into a prime (139968523) 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, 207951 + ... + 208622.

Almost surely, 2^139968528 is an apocalyptic number.

It is an amenable number.

139968528 is an abundant number, since it is smaller than the sum of its proper divisors (273272880).

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

139968528 is a wasteful number, since it uses less digits than its factorization.

139968528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416591 (or 416585 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 139968528 is about 11830.8295567133. The cubic root of 139968528 is about 519.2104981800.

The spelling of 139968528 in words is "one hundred thirty-nine million, nine hundred sixty-eight thousand, five hundred twenty-eight".