505215640 has 16 divisors (see below), whose sum is σ = 1136735280. Its totient is φ = 202086240.

The previous prime is 505215637. The next prime is 505215703. The reversal of 505215640 is 46512505.

It is a junction number, because it is equal to n+sod(n) for n = 505215599 and 505215608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6315156 + ... + 6315235.

It is an arithmetic number, because the mean of its divisors is an integer number (71045955).

Almost surely, 2^505215640 is an apocalyptic number.

It is an amenable number.

505215640 is an abundant number, since it is smaller than the sum of its proper divisors (631519640).

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

505215640 is a wasteful number, since it uses less digits than its factorization.

505215640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12630402 (or 12630398 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 505215640 is about 22477.0024691906. The cubic root of 505215640 is about 796.4507560374.

The spelling of 505215640 in words is "five hundred five million, two hundred fifteen thousand, six hundred forty".