809031402 has 40 divisors (see below), whose sum is σ = 1827150336. Its totient is φ = 267546888.

The previous prime is 809031389. The next prime is 809031403. The reversal of 809031402 is 204130908.

809031402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (809031403) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 913 + ... + 40235.

Almost surely, 2^809031402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809031402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913575168).

809031402 is an abundant number, since it is smaller than the sum of its proper divisors (1018118934).

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

809031402 is a wasteful number, since it uses less digits than its factorization.

809031402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39464 (or 39455 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 809031402 is about 28443.4773190621. The cubic root of 809031402 is about 931.7980407197.

The spelling of 809031402 in words is "eight hundred nine million, thirty-one thousand, four hundred two".