139230812 has 12 divisors (see below), whose sum is σ = 278461680. Its totient is φ = 59670336.

The previous prime is 139230797. The next prime is 139230869. The reversal of 139230812 is 218032931.

139230812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

139230812 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2486237 + ... + 2486292.

It is an arithmetic number, because the mean of its divisors is an integer number (23205140).

Almost surely, 2^139230812 is an apocalyptic number.

It is an amenable number.

139230812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

139230812 is a wasteful number, since it uses less digits than its factorization.

139230812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4972540 (or 4972538 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 139230812 is about 11799.6106715434. The cubic root of 139230812 is about 518.2967099039.

The spelling of 139230812 in words is "one hundred thirty-nine million, two hundred thirty thousand, eight hundred twelve".