272640636 has 18 divisors (see below), whose sum is σ = 689175032. Its totient is φ = 90880200.

The previous prime is 272640607. The next prime is 272640661. The reversal of 272640636 is 636046272.

It is a happy number.

272640636 is a `hidden beast` number, since 2 + 7 + 2 + 640 + 6 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 7573351 = 272640636 / (2 + 7 + 2 + 6 + 4 + 0 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 272640636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3786640 + ... + 3786711.

Almost surely, 2^272640636 is an apocalyptic number.

It is an amenable number.

272640636 is an abundant number, since it is smaller than the sum of its proper divisors (416534396).

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

272640636 is a wasteful number, since it uses less digits than its factorization.

272640636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573361 (or 7573356 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 272640636 is about 16511.8332113669. The cubic root of 272640636 is about 648.4306408150.

The spelling of 272640636 in words is "two hundred seventy-two million, six hundred forty thousand, six hundred thirty-six".