509860806 has 32 divisors (see below), whose sum is σ = 1255043328. Its totient is φ = 134468640.

The previous prime is 509860781. The next prime is 509860811. The reversal of 509860806 is 608068905.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 466360 + ... + 467451.

It is an arithmetic number, because the mean of its divisors is an integer number (39220104).

Almost surely, 2^509860806 is an apocalyptic number.

509860806 is an abundant number, since it is smaller than the sum of its proper divisors (745182522).

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

509860806 is a wasteful number, since it uses less digits than its factorization.

509860806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933836.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 509860806 is about 22580.0975640053. The cubic root of 509860806 is about 798.8842811460.

The spelling of 509860806 in words is "five hundred nine million, eight hundred sixty thousand, eight hundred six".