819872 has 12 divisors (see below), whose sum is σ = 1614186. Its totient is φ = 409920.

The previous prime is 819853. The next prime is 819899. The reversal of 819872 is 278918.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 781456 + 38416 = 884^2 + 196^2 .

It is an unprimeable number.

819872 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12779 + ... + 12842.

2⁸¹⁹⁸⁷² is an apocalyptic number.

It is an amenable number.

819872 is a deficient number, since it is larger than the sum of its proper divisors (794314).

819872 is a wasteful number, since it uses less digits than its factorization.

819872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25631 (or 25623 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 819872 is about 905.4678348787. The cubic root of 819872 is about 93.5941457853.

The spelling of 819872 in words is "eight hundred nineteen thousand, eight hundred seventy-two".