861823488 has 40 divisors (see below), whose sum is σ = 2295955728. Its totient is φ = 287273984.

The previous prime is 861823481. The next prime is 861823493. The reversal of 861823488 is 884328168.

It is a super-2 number, since 2×861823488² = 1485479448936972288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (861823481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279006 + ... + 282077.

Almost surely, 2^861823488 is an apocalyptic number.

It is an amenable number.

861823488 is an abundant number, since it is smaller than the sum of its proper divisors (1434132240).

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

861823488 is an equidigital number, since it uses as much as digits as its factorization.

861823488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561104 (or 561088 counting only the distinct ones).

The product of its digits is 589824, while the sum is 48.

The square root of 861823488 is about 29356.8303466161. The cubic root of 861823488 is about 951.6401907458.

The spelling of 861823488 in words is "eight hundred sixty-one million, eight hundred twenty-three thousand, four hundred eighty-eight".