139218336 has 36 divisors (see below), whose sum is σ = 395902962. Its totient is φ = 46406016.

The previous prime is 139218323. The next prime is 139218341. The reversal of 139218336 is 633812931.

It can be written as a sum of positive squares in only one way, i.e., 120033936 + 19184400 = 10956^2 + 4380^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 139218336.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 241411 + ... + 241986.

Almost surely, 2^139218336 is an apocalyptic number.

139218336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139218336 is an abundant number, since it is smaller than the sum of its proper divisors (256684626).

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

139218336 is a wasteful number, since it uses less digits than its factorization.

139218336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483413 (or 483402 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 139218336 is about 11799.0819981895. The cubic root of 139218336 is about 518.2812285057.

The spelling of 139218336 in words is "one hundred thirty-nine million, two hundred eighteen thousand, three hundred thirty-six".