899872281 has 144 divisors (see below), whose sum is σ = 1783689600. Its totient is φ = 438799680.

The previous prime is 899872279. The next prime is 899872289. The reversal of 899872281 is 182278998.

It is not a de Polignac number, because 899872281 - 2¹ = 899872279 is a prime.

It is a super-2 number, since 2×899872281² = 1619540244224285922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (899872289) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8255655 + ... + 8255763.

Almost surely, 2^899872281 is an apocalyptic number.

It is an amenable number.

899872281 is a deficient number, since it is larger than the sum of its proper divisors (883817319).

899872281 is a wasteful number, since it uses less digits than its factorization.

899872281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 149 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 899872281 is about 29997.8712744755. The cubic root of 899872281 is about 965.4437115789.

The spelling of 899872281 in words is "eight hundred ninety-nine million, eight hundred seventy-two thousand, two hundred eighty-one".