516457640 has 32 divisors (see below), whose sum is σ = 1212554880. Its totient is φ = 197600832.

The previous prime is 516457633. The next prime is 516457657. The reversal of 516457640 is 46754615.

It is a junction number, because it is equal to n+sod(n) for n = 516457594 and 516457603.

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, 279764 + ... + 281603.

It is an arithmetic number, because the mean of its divisors is an integer number (37892340).

Almost surely, 2^516457640 is an apocalyptic number.

It is an amenable number.

516457640 is an abundant number, since it is smaller than the sum of its proper divisors (696097240).

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

516457640 is a wasteful number, since it uses less digits than its factorization.

516457640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561401 (or 561397 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 516457640 is about 22725.7043895233. The cubic root of 516457640 is about 802.3149821107.

The spelling of 516457640 in words is "five hundred sixteen million, four hundred fifty-seven thousand, six hundred forty".