872143646 has 16 divisors (see below), whose sum is σ = 1473182208. Its totient is φ = 383640600.

The previous prime is 872143631. The next prime is 872143661. The reversal of 872143646 is 646341278.

It is an interprime number because it is at equal distance from previous prime (872143631) and next prime (872143661).

It is a super-3 number, since 3×872143646³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638720 + ... + 640083.

It is an arithmetic number, because the mean of its divisors is an integer number (92073888).

Almost surely, 2^872143646 is an apocalyptic number.

872143646 is a deficient number, since it is larger than the sum of its proper divisors (601038562).

872143646 is a wasteful number, since it uses less digits than its factorization.

872143646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278847.

The product of its digits is 193536, while the sum is 41.

The square root of 872143646 is about 29532.0782539936. The cubic root of 872143646 is about 955.4236932871.

The spelling of 872143646 in words is "eight hundred seventy-two million, one hundred forty-three thousand, six hundred forty-six".