136881528 has 32 divisors (see below), whose sum is σ = 391090560. Its totient is φ = 39108960.

The previous prime is 136881527. The next prime is 136881557. The reversal of 136881528 is 825188631.

It is a super-2 number, since 2×136881528² = 37473105415229568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 136881528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136881527) 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 7 ways as a sum of consecutive naturals, for example, 407218 + ... + 407553.

It is an arithmetic number, because the mean of its divisors is an integer number (12221580).

Almost surely, 2^136881528 is an apocalyptic number.

It is an amenable number.

136881528 is an abundant number, since it is smaller than the sum of its proper divisors (254209032).

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

136881528 is a wasteful number, since it uses less digits than its factorization.

136881528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814787 (or 814783 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 136881528 is about 11699.6379431160. The cubic root of 136881528 is about 515.3650323088.

The spelling of 136881528 in words is "one hundred thirty-six million, eight hundred eighty-one thousand, five hundred twenty-eight".