872231018 has 8 divisors (see below), whose sum is σ = 1308546948. Its totient is φ = 436048704.

The previous prime is 872231011. The next prime is 872231023. The reversal of 872231018 is 810132278.

It can be written as a sum of positive squares in 2 ways, for example, as 815273809 + 56957209 = 28553^2 + 7547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×872231018² = 1521573897522632648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (872231011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15071 + ... + 44402.

Almost surely, 2^872231018 is an apocalyptic number.

872231018 is a deficient number, since it is larger than the sum of its proper divisors (436315930).

872231018 is a wasteful number, since it uses less digits than its factorization.

872231018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66808.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 872231018 is about 29533.5574897438. The cubic root of 872231018 is about 955.4555972408.

The spelling of 872231018 in words is "eight hundred seventy-two million, two hundred thirty-one thousand, eighteen".