819472 has 10 divisors (see below), whose sum is σ = 1587758. Its totient is φ = 409728.

The previous prime is 819463. The next prime is 819473. The reversal of 819472 is 274918.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 173056 = 804^2 + 416^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (819473) by changing a digit.

819472 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25593 + ... + 25624.

2⁸¹⁹⁴⁷² is an apocalyptic number.

It is an amenable number.

819472 is a deficient number, since it is larger than the sum of its proper divisors (768286).

819472 is a wasteful number, since it uses less digits than its factorization.

819472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51225 (or 51219 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 819472 is about 905.2469276391. The cubic root of 819472 is about 93.5789223730.

The spelling of 819472 in words is "eight hundred nineteen thousand, four hundred seventy-two".