809529372 has 18 divisors (see below), whose sum is σ = 2046310448. Its totient is φ = 269843112.

The previous prime is 809529359. The next prime is 809529397. The reversal of 809529372 is 273925908.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11243428 + ... + 11243499.

Almost surely, 2^809529372 is an apocalyptic number.

It is an amenable number.

809529372 is an abundant number, since it is smaller than the sum of its proper divisors (1236781076).

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

809529372 is a wasteful number, since it uses less digits than its factorization.

809529372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22486937 (or 22486932 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 809529372 is about 28452.2296490099. The cubic root of 809529372 is about 931.9891796960.

The spelling of 809529372 in words is "eight hundred nine million, five hundred twenty-nine thousand, three hundred seventy-two".