505894720 has 28 divisors (see below), whose sum is σ = 1204662564. Its totient is φ = 202357760.

The previous prime is 505894709. The next prime is 505894723. The reversal of 505894720 is 27498505.

It can be written as a sum of positive squares in 2 ways, for example, as 319408384 + 186486336 = 17872^2 + 13656^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505894723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790141 + ... + 790780.

It is an arithmetic number, because the mean of its divisors is an integer number (43023663).

Almost surely, 2^505894720 is an apocalyptic number.

It is an amenable number.

505894720 is an abundant number, since it is smaller than the sum of its proper divisors (698767844).

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

505894720 is a wasteful number, since it uses less digits than its factorization.

505894720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580938 (or 1580928 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 505894720 is about 22492.1035032298. The cubic root of 505894720 is about 796.8074430900.

The spelling of 505894720 in words is "five hundred five million, eight hundred ninety-four thousand, seven hundred twenty".