505915940 has 12 divisors (see below), whose sum is σ = 1062423516. Its totient is φ = 202366368.

The previous prime is 505915913. The next prime is 505915951. The reversal of 505915940 is 49519505.

It can be written as a sum of positive squares in 2 ways, for example, as 79245604 + 426670336 = 8902^2 + 20656^2 .

It is a junction number, because it is equal to n+sod(n) for n = 505915894 and 505915903.

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, 12647879 + ... + 12647918.

It is an arithmetic number, because the mean of its divisors is an integer number (88535293).

Almost surely, 2^505915940 is an apocalyptic number.

It is an amenable number.

505915940 is an abundant number, since it is smaller than the sum of its proper divisors (556507576).

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

505915940 is a wasteful number, since it uses less digits than its factorization.

505915940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25295806 (or 25295804 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 505915940 is about 22492.5752193918. The cubic root of 505915940 is about 796.8185837594.

The spelling of 505915940 in words is "five hundred five million, nine hundred fifteen thousand, nine hundred forty".