509698448 has 20 divisors (see below), whose sum is σ = 1128618240. Its totient is φ = 218442144.

The previous prime is 509698433. The next prime is 509698457. The reversal of 509698448 is 844896905.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 509698448.

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, 2275328 + ... + 2275551.

It is an arithmetic number, because the mean of its divisors is an integer number (56430912).

Almost surely, 2^509698448 is an apocalyptic number.

It is an amenable number.

509698448 is an abundant number, since it is smaller than the sum of its proper divisors (618919792).

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

509698448 is a wasteful number, since it uses less digits than its factorization.

509698448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550894 (or 4550888 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 509698448 is about 22576.5021205677. The cubic root of 509698448 is about 798.7994743238.

The spelling of 509698448 in words is "five hundred nine million, six hundred ninety-eight thousand, four hundred forty-eight".