809450972 has 24 divisors (see below), whose sum is σ = 1571512320. Its totient is φ = 361694960.

The previous prime is 809450969. The next prime is 809450989. The reversal of 809450972 is 279054908.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 153308 + ... + 158499.

It is an arithmetic number, because the mean of its divisors is an integer number (65479680).

Almost surely, 2^809450972 is an apocalyptic number.

It is an amenable number.

809450972 is a deficient number, since it is larger than the sum of its proper divisors (762061348).

809450972 is a wasteful number, since it uses less digits than its factorization.

809450972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311881 (or 311879 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 809450972 is about 28450.8518677385. The cubic root of 809450972 is about 931.9590921277.

The spelling of 809450972 in words is "eight hundred nine million, four hundred fifty thousand, nine hundred seventy-two".