817540272 has 30 divisors (see below), whose sum is σ = 2287977692. Its totient is φ = 272513376.

The previous prime is 817540261. The next prime is 817540307. The reversal of 817540272 is 272045718.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 2838538 + ... + 2838825.

Almost surely, 2^817540272 is an apocalyptic number.

It is an amenable number.

817540272 is an abundant number, since it is smaller than the sum of its proper divisors (1470437420).

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

817540272 is a wasteful number, since it uses less digits than its factorization.

817540272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677377 (or 5677368 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 817540272 is about 28592.6611563177. The cubic root of 817540272 is about 935.0533382976.

The spelling of 817540272 in words is "eight hundred seventeen million, five hundred forty thousand, two hundred seventy-two".