517297872 has 80 divisors (see below), whose sum is σ = 1644755840. Its totient is φ = 136429056.

The previous prime is 517297871. The next prime is 517297901. The reversal of 517297872 is 278792715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517297871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54847 + ... + 63582.

It is an arithmetic number, because the mean of its divisors is an integer number (20559448).

Almost surely, 2^517297872 is an apocalyptic number.

517297872 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

517297872 is an abundant number, since it is smaller than the sum of its proper divisors (1127457968).

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

517297872 is a wasteful number, since it uses less digits than its factorization.

517297872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118460 (or 118454 counting only the distinct ones).

The product of its digits is 493920, while the sum is 48.

The square root of 517297872 is about 22744.1832563845. The cubic root of 517297872 is about 802.7498454410.

The spelling of 517297872 in words is "five hundred seventeen million, two hundred ninety-seven thousand, eight hundred seventy-two".