139290828 has 24 divisors (see below), whose sum is σ = 336220080. Its totient is φ = 44829120.

The previous prime is 139290793. The next prime is 139290839. The reversal of 139290828 is 828092931.

It is a self number, because there is not a number n which added to its sum of digits gives 139290828.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199783 + ... + 200478.

It is an arithmetic number, because the mean of its divisors is an integer number (14009170).

Almost surely, 2^139290828 is an apocalyptic number.

It is an amenable number.

139290828 is an abundant number, since it is smaller than the sum of its proper divisors (196929252).

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

139290828 is a wasteful number, since it uses less digits than its factorization.

139290828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400297 (or 400295 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 139290828 is about 11802.1535323008. The cubic root of 139290828 is about 518.3711704980.

The spelling of 139290828 in words is "one hundred thirty-nine million, two hundred ninety thousand, eight hundred twenty-eight".