138753228 has 12 divisors (see below), whose sum is σ = 323757560. Its totient is φ = 46251072.

The previous prime is 138753221. The next prime is 138753239. The reversal of 138753228 is 822357831.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (138753221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5781373 + ... + 5781396.

Almost surely, 2^138753228 is an apocalyptic number.

It is an amenable number.

138753228 is an abundant number, since it is smaller than the sum of its proper divisors (185004332).

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

138753228 is a wasteful number, since it uses less digits than its factorization.

138753228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11562776 (or 11562774 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 138753228 is about 11779.3560095618. The cubic root of 138753228 is about 517.7034174286.

It can be divided in two parts, 1387 and 53228, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 138753228 in words is "one hundred thirty-eight million, seven hundred fifty-three thousand, two hundred twenty-eight".