517072440 has 32 divisors (see below), whose sum is σ = 1551217680. Its totient is φ = 137885952.

The previous prime is 517072411. The next prime is 517072469. The reversal of 517072440 is 44270715.

It is an interprime number because it is at equal distance from previous prime (517072411) and next prime (517072469).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 517072398 and 517072407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154349 + ... + 2154588.

Almost surely, 2^517072440 is an apocalyptic number.

It is an amenable number.

517072440 is an abundant number, since it is smaller than the sum of its proper divisors (1034145240).

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

517072440 is a wasteful number, since it uses less digits than its factorization.

517072440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308951 (or 4308947 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 517072440 is about 22739.2268997871. The cubic root of 517072440 is about 802.6332190208.

The spelling of 517072440 in words is "five hundred seventeen million, seventy-two thousand, four hundred forty".