138884828 has 24 divisors (see below), whose sum is σ = 258232800. Its totient is φ = 65233728.

The previous prime is 138884827. The next prime is 138884843. The reversal of 138884828 is 828488831.

138884828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138884821) 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, 11888 + ... + 20471.

It is an arithmetic number, because the mean of its divisors is an integer number (10759700).

Almost surely, 2^138884828 is an apocalyptic number.

It is an amenable number.

138884828 is a deficient number, since it is larger than the sum of its proper divisors (119347972).

138884828 is a wasteful number, since it uses less digits than its factorization.

138884828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32429 (or 32427 counting only the distinct ones).

The product of its digits is 786432, while the sum is 50.

The square root of 138884828 is about 11784.9407295922. The cubic root of 138884828 is about 517.8670370261.

The spelling of 138884828 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, eight hundred twenty-eight".