515990840 has 32 divisors (see below), whose sum is σ = 1170132480. Its totient is φ = 204769152.

The previous prime is 515990837. The next prime is 515990857. The reversal of 515990840 is 48099515.

It is a happy number.

It is a super-5 number, since 5×515990840⁵ (a number of 45 digits) contains 55555 as substring.

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, 45707 + ... + 55866.

It is an arithmetic number, because the mean of its divisors is an integer number (36566640).

Almost surely, 2^515990840 is an apocalyptic number.

It is an amenable number.

515990840 is an abundant number, since it is smaller than the sum of its proper divisors (654141640).

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

515990840 is a wasteful number, since it uses less digits than its factorization.

515990840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101711 (or 101707 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 515990840 is about 22715.4317590487. The cubic root of 515990840 is about 802.0731852377.

The spelling of 515990840 in words is "five hundred fifteen million, nine hundred ninety thousand, eight hundred forty".