872142858 has 12 divisors (see below), whose sum is σ = 1889642898. Its totient is φ = 290714280.

The previous prime is 872142847. The next prime is 872142893. The reversal of 872142858 is 858241278.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 857142729 + 15000129 = 29277^2 + 3873^2 .

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 24226173 + ... + 24226208.

Almost surely, 2^872142858 is an apocalyptic number.

872142858 is an abundant number, since it is smaller than the sum of its proper divisors (1017500040).

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

872142858 is a wasteful number, since it uses less digits than its factorization.

872142858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48452389 (or 48452386 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 872142858 is about 29532.0649125658. The cubic root of 872142858 is about 955.4234055386.

The spelling of 872142858 in words is "eight hundred seventy-two million, one hundred forty-two thousand, eight hundred fifty-eight".