136487920 has 40 divisors (see below), whose sum is σ = 328282560. Its totient is φ = 52711680.

The previous prime is 136487909. The next prime is 136487921. The reversal of 136487920 is 29784631.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136487921) 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, 27096 + ... + 31735.

It is an arithmetic number, because the mean of its divisors is an integer number (8207064).

Almost surely, 2^136487920 is an apocalyptic number.

136487920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136487920 is an abundant number, since it is smaller than the sum of its proper divisors (191794640).

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

136487920 is a wasteful number, since it uses less digits than its factorization.

136487920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58873 (or 58867 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 136487920 is about 11682.8044578346. The cubic root of 136487920 is about 514.8705741940.

The spelling of 136487920 in words is "one hundred thirty-six million, four hundred eighty-seven thousand, nine hundred twenty".