515238420 has 48 divisors (see below), whose sum is σ = 1451334528. Its totient is φ = 136571520.

The previous prime is 515238359. The next prime is 515238457. The reversal of 515238420 is 24832515.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15691 + ... + 35730.

It is an arithmetic number, because the mean of its divisors is an integer number (30236136).

Almost surely, 2^515238420 is an apocalyptic number.

It is an amenable number.

515238420 is an abundant number, since it is smaller than the sum of its proper divisors (936096108).

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

515238420 is a wasteful number, since it uses less digits than its factorization.

515238420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51600 (or 51598 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 515238420 is about 22698.8638482194. The cubic root of 515238420 is about 801.6831334272.

The spelling of 515238420 in words is "five hundred fifteen million, two hundred thirty-eight thousand, four hundred twenty".