136587990 has 96 divisors (see below), whose sum is σ = 416047104. Its totient is φ = 28378560.

The previous prime is 136587973. The next prime is 136588021. The reversal of 136587990 is 99785631.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 11947 + ... + 20393.

It is an arithmetic number, because the mean of its divisors is an integer number (4333824).

Almost surely, 2^136587990 is an apocalyptic number.

136587990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 136587990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208023552).

136587990 is an abundant number, since it is smaller than the sum of its proper divisors (279459114).

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

136587990 is a wasteful number, since it uses less digits than its factorization.

136587990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8482 (or 8475 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 136587990 is about 11687.0864632722. The cubic root of 136587990 is about 514.9963741222.

The spelling of 136587990 in words is "one hundred thirty-six million, five hundred eighty-seven thousand, nine hundred ninety".