139259020 has 48 divisors (see below), whose sum is σ = 308403648. Its totient is φ = 52715520.

The previous prime is 139259017. The next prime is 139259033. The reversal of 139259020 is 20952931.

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, 43060 + ... + 46180.

It is an arithmetic number, because the mean of its divisors is an integer number (6425076).

Almost surely, 2^139259020 is an apocalyptic number.

139259020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139259020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154201824).

139259020 is an abundant number, since it is smaller than the sum of its proper divisors (169144628).

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

139259020 is a wasteful number, since it uses less digits than its factorization.

139259020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 139259020 is about 11800.8059046830. The cubic root of 139259020 is about 518.3317096432.

The spelling of 139259020 in words is "one hundred thirty-nine million, two hundred fifty-nine thousand, twenty".