515858940 has 72 divisors (see below), whose sum is σ = 1584623040. Its totient is φ = 135817344.

The previous prime is 515858933. The next prime is 515858951. The reversal of 515858940 is 49858515.

It is a happy number.

It is a super-2 number, since 2×515858940² = 532220891955847200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3919 + ... + 32358.

Almost surely, 2^515858940 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 515858940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792311520).

515858940 is an abundant number, since it is smaller than the sum of its proper divisors (1068764100).

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

515858940 is a wasteful number, since it uses less digits than its factorization.

515858940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36371 (or 36366 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The square root of 515858940 is about 22712.5282608520. The cubic root of 515858940 is about 802.0048361763.

The spelling of 515858940 in words is "five hundred fifteen million, eight hundred fifty-eight thousand, nine hundred forty".