50139618 has 16 divisors (see below), whose sum is σ = 100400256. Its totient is φ = 16693040.

The previous prime is 50139611. The next prime is 50139623. The reversal of 50139618 is 81693105.

It is not an unprimeable number, because it can be changed into a prime (50139611) 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, 880 + ... + 10052.

It is an arithmetic number, because the mean of its divisors is an integer number (6275016).

Almost surely, 2^50139618 is an apocalyptic number.

50139618 is an abundant number, since it is smaller than the sum of its proper divisors (50260638).

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

50139618 is a wasteful number, since it uses less digits than its factorization.

50139618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10089.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 50139618 is about 7080.9334130466. The cubic root of 50139618 is about 368.7457359269.

The spelling of 50139618 in words is "fifty million, one hundred thirty-nine thousand, six hundred eighteen".