136732720 has 40 divisors (see below), whose sum is σ = 323126640. Its totient is φ = 53794560.

The previous prime is 136732711. The next prime is 136732727. The reversal of 136732720 is 27237631.

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

It is not an unprimeable number, because it can be changed into a prime (136732727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9130 + ... + 18889.

It is an arithmetic number, because the mean of its divisors is an integer number (8078166).

Almost surely, 2^136732720 is an apocalyptic number.

136732720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136732720 is an abundant number, since it is smaller than the sum of its proper divisors (186393920).

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

136732720 is a wasteful number, since it uses less digits than its factorization.

136732720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28093 (or 28087 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 136732720 is about 11693.2767007371. The cubic root of 136732720 is about 515.1782083488.

The spelling of 136732720 in words is "one hundred thirty-six million, seven hundred thirty-two thousand, seven hundred twenty".