136136988 has 72 divisors (see below), whose sum is σ = 371987616. Its totient is φ = 41731200.

The previous prime is 136136983. The next prime is 136136993. The reversal of 136136988 is 889631631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (136136983) and next prime (136136993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136136983) 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 23 ways as a sum of consecutive naturals, for example, 215433 + ... + 216063.

Almost surely, 2^136136988 is an apocalyptic number.

136136988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136136988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185993808).

136136988 is an abundant number, since it is smaller than the sum of its proper divisors (235850628).

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

136136988 is a wasteful number, since it uses less digits than its factorization.

136136988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1110 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 136136988 is about 11667.7756234854. The cubic root of 136136988 is about 514.4289242709.

The spelling of 136136988 in words is "one hundred thirty-six million, one hundred thirty-six thousand, nine hundred eighty-eight".