515604090 has 64 divisors (see below), whose sum is σ = 1282563072. Its totient is φ = 132518400.

The previous prime is 515604077. The next prime is 515604109. The reversal of 515604090 is 90406515.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260344 + ... + 262316.

It is an arithmetic number, because the mean of its divisors is an integer number (20040048).

Almost surely, 2^515604090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515604090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (641281536).

515604090 is an abundant number, since it is smaller than the sum of its proper divisors (766958982).

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

515604090 is a wasteful number, since it uses less digits than its factorization.

515604090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 515604090 is about 22706.9172280167. The cubic root of 515604090 is about 801.8727428304.

The spelling of 515604090 in words is "five hundred fifteen million, six hundred four thousand, ninety".