809730642 has 32 divisors (see below), whose sum is σ = 1854076032. Its totient is φ = 230943744.

The previous prime is 809730629. The next prime is 809730643. The reversal of 809730642 is 246037908.

It is a self number, because there is not a number n which added to its sum of digits gives 809730642.

It is not an unprimeable number, because it can be changed into a prime (809730643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7528 + ... + 40940.

It is an arithmetic number, because the mean of its divisors is an integer number (57939876).

Almost surely, 2^809730642 is an apocalyptic number.

809730642 is an abundant number, since it is smaller than the sum of its proper divisors (1044345390).

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

809730642 is a wasteful number, since it uses less digits than its factorization.

809730642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 809730642 is about 28455.7664103429. The cubic root of 809730642 is about 932.0664121905.

The spelling of 809730642 in words is "eight hundred nine million, seven hundred thirty thousand, six hundred forty-two".