139986402 has 16 divisors (see below), whose sum is σ = 280117440. Its totient is φ = 46638032.

The previous prime is 139986397. The next prime is 139986403. The reversal of 139986402 is 204689931.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (139986403) 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, 9724 + ... + 19352.

It is an arithmetic number, because the mean of its divisors is an integer number (17507340).

Almost surely, 2^139986402 is an apocalyptic number.

139986402 is an abundant number, since it is smaller than the sum of its proper divisors (140131038).

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

139986402 is a wasteful number, since it uses less digits than its factorization.

139986402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12057.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 139986402 is about 11831.5849318678. The cubic root of 139986402 is about 519.2325983230.

The spelling of 139986402 in words is "one hundred thirty-nine million, nine hundred eighty-six thousand, four hundred two".