136640800 has 36 divisors (see below), whose sum is σ = 333576306. Its totient is φ = 54656000.

The previous prime is 136640789. The next prime is 136640809. The reversal of 136640800 is 8046631.

It can be written as a sum of positive squares in 3 ways, for example, as 117245584 + 19395216 = 10828^2 + 4404^2 .

It is not an unprimeable number, because it can be changed into a prime (136640809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84601 + ... + 86200.

Almost surely, 2^136640800 is an apocalyptic number.

136640800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136640800 is an abundant number, since it is smaller than the sum of its proper divisors (196935506).

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

136640800 is a wasteful number, since it uses less digits than its factorization.

136640800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170821 (or 170808 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 136640800 is about 11689.3455762074. The cubic root of 136640800 is about 515.0627378246.

The spelling of 136640800 in words is "one hundred thirty-six million, six hundred forty thousand, eight hundred".