809985830 has 16 divisors (see below), whose sum is σ = 1459024704. Its totient is φ = 323760960.

The previous prime is 809985829. The next prime is 809985853. The reversal of 809985830 is 38589908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14231 + ... + 42690.

It is an arithmetic number, because the mean of its divisors is an integer number (91189044).

Almost surely, 2^809985830 is an apocalyptic number.

809985830 is a deficient number, since it is larger than the sum of its proper divisors (649038874).

809985830 is a wasteful number, since it uses less digits than its factorization.

809985830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58351.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 809985830 is about 28460.2499989020. The cubic root of 809985830 is about 932.1643160156.

The spelling of 809985830 in words is "eight hundred nine million, nine hundred eighty-five thousand, eight hundred thirty".