138369812 has 24 divisors (see below), whose sum is σ = 277658304. Its totient is φ = 59104512.

The previous prime is 138369797. The next prime is 138369853. The reversal of 138369812 is 218963831.

138369812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 138369812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (11569096).

Almost surely, 2^138369812 is an apocalyptic number.

It is an amenable number.

138369812 is an abundant number, since it is smaller than the sum of its proper divisors (139288492).

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

138369812 is a wasteful number, since it uses less digits than its factorization.

138369812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16415 (or 16413 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 138369812 is about 11763.0698374191. The cubic root of 138369812 is about 517.2261218931.

The spelling of 138369812 in words is "one hundred thirty-eight million, three hundred sixty-nine thousand, eight hundred twelve".