809269020 has 144 divisors (see below), whose sum is σ = 2970571968. Its totient is φ = 174090240.

The previous prime is 809269009. The next prime is 809269039. The reversal of 809269020 is 20962908.

809269020 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 (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2530 + ... + 40310.

It is an arithmetic number, because the mean of its divisors is an integer number (20628972).

Almost surely, 2^809269020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809269020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485285984).

809269020 is an abundant number, since it is smaller than the sum of its proper divisors (2161302948).

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

809269020 is a wasteful number, since it uses less digits than its factorization.

809269020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37820 (or 37815 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 809269020 is about 28447.6540333294. The cubic root of 809269020 is about 931.8892569210.

The spelling of 809269020 in words is "eight hundred nine million, two hundred sixty-nine thousand, twenty".