516566440 has 32 divisors (see below), whose sum is σ = 1251681480. Its totient is φ = 190732032.

The previous prime is 516566429. The next prime is 516566443. The reversal of 516566440 is 44665615.

It can be written as a sum of positive squares in 4 ways, for example, as 164403684 + 352162756 = 12822^2 + 18766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 516566440.

It is not an unprimeable number, because it can be changed into a prime (516566443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496179 + ... + 497218.

Almost surely, 2^516566440 is an apocalyptic number.

It is an amenable number.

516566440 is an abundant number, since it is smaller than the sum of its proper divisors (735115040).

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

516566440 is a wasteful number, since it uses less digits than its factorization.

516566440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993421 (or 993417 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 516566440 is about 22728.0980286517. The cubic root of 516566440 is about 802.3713182837.

The spelling of 516566440 in words is "five hundred sixteen million, five hundred sixty-six thousand, four hundred forty".