115139020 has 12 divisors (see below), whose sum is σ = 241791984. Its totient is φ = 46055600.

The previous prime is 115138999. The next prime is 115139021. The reversal of 115139020 is 20931511.

It is a junction number, because it is equal to n+sod(n) for n = 115138982 and 115139000.

It is not an unprimeable number, because it can be changed into a prime (115139021) 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, 2878456 + ... + 2878495.

It is an arithmetic number, because the mean of its divisors is an integer number (20149332).

Almost surely, 2^115139020 is an apocalyptic number.

115139020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115139020 is an abundant number, since it is smaller than the sum of its proper divisors (126652964).

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

115139020 is a wasteful number, since it uses less digits than its factorization.

115139020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756960 (or 5756958 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 115139020 is about 10730.2851779438. The cubic root of 115139020 is about 486.4902897061.

The spelling of 115139020 in words is "one hundred fifteen million, one hundred thirty-nine thousand, twenty".