515090988 has 108 divisors (see below), whose sum is σ = 1424583160. Its totient is φ = 162502848.

The previous prime is 515090929. The next prime is 515091019. The reversal of 515090988 is 889090515.

515090988 is a `hidden beast` number, since 51 + 509 + 0 + 98 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is a super-2 number, since 2×515090988² = 530637451837632288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 498120 + ... + 499152.

Almost surely, 2^515090988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515090988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712291580).

515090988 is an abundant number, since it is smaller than the sum of its proper divisors (909492172).

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

515090988 is a wasteful number, since it uses less digits than its factorization.

515090988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 515090988 is about 22695.6160524450. The cubic root of 515090988 is about 801.6066607249.

The spelling of 515090988 in words is "five hundred fifteen million, ninety thousand, nine hundred eighty-eight".