872891481 has 32 divisors (see below), whose sum is σ = 1454745600. Its totient is φ = 452292480.

The previous prime is 872891449. The next prime is 872891501. The reversal of 872891481 is 184198278.

It is not a de Polignac number, because 872891481 - 2⁵ = 872891449 is a prime.

It is a super-2 number, since 2×872891481² = 1523879075204746722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 872891481.

It is not an unprimeable number, because it can be changed into a prime (872891431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89860 + ... + 99098.

It is an arithmetic number, because the mean of its divisors is an integer number (45460800).

Almost surely, 2^872891481 is an apocalyptic number.

It is an amenable number.

872891481 is a deficient number, since it is larger than the sum of its proper divisors (581854119).

872891481 is a wasteful number, since it uses less digits than its factorization.

872891481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9669.

The product of its digits is 258048, while the sum is 48.

The square root of 872891481 is about 29544.7369424742. The cubic root of 872891481 is about 955.6966969214.

The spelling of 872891481 in words is "eight hundred seventy-two million, eight hundred ninety-one thousand, four hundred eighty-one".