138825237428 has 12 divisors (see below), whose sum is σ = 249510224292. Its totient is φ = 67536601920.

The previous prime is 138825237389. The next prime is 138825237487. The reversal of 138825237428 is 824732528831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 94109059984 + 44716177444 = 306772^2 + 211462^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138825237428.

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 3 ways as a sum of consecutive naturals, for example, 469004033 + ... + 469004328.

It is an arithmetic number, because the mean of its divisors is an integer number (20792518691).

Almost surely, 2^138825237428 is an apocalyptic number.

It is an amenable number.

138825237428 is a deficient number, since it is larger than the sum of its proper divisors (110684986864).

138825237428 is a wasteful number, since it uses less digits than its factorization.

138825237428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938008402 (or 938008400 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 53.

The spelling of 138825237428 in words is "one hundred thirty-eight billion, eight hundred twenty-five million, two hundred thirty-seven thousand, four hundred twenty-eight".