136929680 has 20 divisors (see below), whose sum is σ = 318361692. Its totient is φ = 54771840.

The previous prime is 136929643. The next prime is 136929691. The reversal of 136929680 is 86929631.

It can be written as a sum of positive squares in 2 ways, for example, as 92467456 + 44462224 = 9616^2 + 6668^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855731 + ... + 855890.

Almost surely, 2^136929680 is an apocalyptic number.

136929680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136929680 is an abundant number, since it is smaller than the sum of its proper divisors (181432012).

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

136929680 is a wasteful number, since it uses less digits than its factorization.

136929680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711634 (or 1711628 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 136929680 is about 11701.6956036294. The cubic root of 136929680 is about 515.4254566969.

The spelling of 136929680 in words is "one hundred thirty-six million, nine hundred twenty-nine thousand, six hundred eighty".