899171280 has 400 divisors, whose sum is σ = 3660015744. Its totient is φ = 200309760.

The previous prime is 899171267. The next prime is 899171281. The reversal of 899171280 is 82171998.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899171281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1950250 + ... + 1950710.

Almost surely, 2^899171280 is an apocalyptic number.

899171280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 899171280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830007872).

899171280 is an abundant number, since it is smaller than the sum of its proper divisors (2760844464).

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

899171280 is a wasteful number, since it uses less digits than its factorization.

899171280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 899171280 is about 29986.1848190129. The cubic root of 899171280 is about 965.1929527271.

The spelling of 899171280 in words is "eight hundred ninety-nine million, one hundred seventy-one thousand, two hundred eighty".