136988390 has 32 divisors (see below), whose sum is σ = 307425024. Its totient is φ = 42697440.

The previous prime is 136988387. The next prime is 136988399. The reversal of 136988390 is 93889631.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136988399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88184 + ... + 89723.

It is an arithmetic number, because the mean of its divisors is an integer number (9607032).

Almost surely, 2^136988390 is an apocalyptic number.

136988390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136988390 is an abundant number, since it is smaller than the sum of its proper divisors (170436634).

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

136988390 is a wasteful number, since it uses less digits than its factorization.

136988390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177932.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 136988390 is about 11704.2039455915. The cubic root of 136988390 is about 515.4991108156.

The spelling of 136988390 in words is "one hundred thirty-six million, nine hundred eighty-eight thousand, three hundred ninety".