138633336 has 32 divisors (see below), whose sum is σ = 385093200. Its totient is φ = 46211040.

The previous prime is 138633331. The next prime is 138633353. The reversal of 138633336 is 633336831.

138633336 is a `hidden beast` number, since 13 + 8 + 633 + 3 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 138633336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138633331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320695 + ... + 321126.

Almost surely, 2^138633336 is an apocalyptic number.

It is an amenable number.

138633336 is an abundant number, since it is smaller than the sum of its proper divisors (246459864).

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

138633336 is a wasteful number, since it uses less digits than its factorization.

138633336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641836 (or 641826 counting only the distinct ones).

The product of its digits is 69984, while the sum is 36.

The square root of 138633336 is about 11774.2658369853. The cubic root of 138633336 is about 517.5542644210.

The spelling of 138633336 in words is "one hundred thirty-eight million, six hundred thirty-three thousand, three hundred thirty-six".