139088028 has 12 divisors (see below), whose sum is σ = 324538760. Its totient is φ = 46362672.

The previous prime is 139088023. The next prime is 139088029. The reversal of 139088028 is 820880931.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139088023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5795323 + ... + 5795346.

Almost surely, 2^139088028 is an apocalyptic number.

It is an amenable number.

139088028 is an abundant number, since it is smaller than the sum of its proper divisors (185450732).

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

139088028 is a wasteful number, since it uses less digits than its factorization.

139088028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11590676 (or 11590674 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 139088028 is about 11793.5587504366. The cubic root of 139088028 is about 518.1194747347.

The spelling of 139088028 in words is "one hundred thirty-nine million, eighty-eight thousand, twenty-eight".