138894396 has 24 divisors (see below), whose sum is σ = 324745344. Its totient is φ = 46204080.

The previous prime is 138894341. The next prime is 138894407. The reversal of 138894396 is 693498831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5470 + ... + 17541.

It is an arithmetic number, because the mean of its divisors is an integer number (13531056).

Almost surely, 2^138894396 is an apocalyptic number.

It is an amenable number.

138894396 is an abundant number, since it is smaller than the sum of its proper divisors (185850948).

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

138894396 is a wasteful number, since it uses less digits than its factorization.

138894396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23521 (or 23519 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 138894396 is about 11785.3466643964. The cubic root of 138894396 is about 517.8789289850.

The spelling of 138894396 in words is "one hundred thirty-eight million, eight hundred ninety-four thousand, three hundred ninety-six".