517240944 has 160 divisors (see below), whose sum is σ = 1639180800. Its totient is φ = 154851840.

The previous prime is 517240943. The next prime is 517240949. The reversal of 517240944 is 449042715.

It is a happy number.

It is a super-2 number, since 2×517240944² = 535076388300022272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 517240899 and 517240908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517240943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422317 + ... + 423539.

It is an arithmetic number, because the mean of its divisors is an integer number (10244880).

Almost surely, 2^517240944 is an apocalyptic number.

517240944 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 517240944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819590400).

517240944 is an abundant number, since it is smaller than the sum of its proper divisors (1121939856).

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

517240944 is a wasteful number, since it uses less digits than its factorization.

517240944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 517240944 is about 22742.9317371354. The cubic root of 517240944 is about 802.7203971469.

The spelling of 517240944 in words is "five hundred seventeen million, two hundred forty thousand, nine hundred forty-four".