819230172 has 48 divisors (see below), whose sum is σ = 1992574080. Its totient is φ = 261721152.

The previous prime is 819230147. The next prime is 819230177. The reversal of 819230172 is 271032918.

It is a super-2 number, since 2×819230172² = 1342276149430299168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819230177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15979 + ... + 43517.

It is an arithmetic number, because the mean of its divisors is an integer number (41511960).

Almost surely, 2^819230172 is an apocalyptic number.

It is an amenable number.

819230172 is an abundant number, since it is smaller than the sum of its proper divisors (1173343908).

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

819230172 is a wasteful number, since it uses less digits than its factorization.

819230172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27650 (or 27648 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 819230172 is about 28622.1971902927. The cubic root of 819230172 is about 935.6971635172.

The spelling of 819230172 in words is "eight hundred nineteen million, two hundred thirty thousand, one hundred seventy-two".