899281920 has 176 divisors, whose sum is σ = 2905233408. Its totient is φ = 237404160.

The previous prime is 899281897. The next prime is 899281927. The reversal of 899281920 is 29182998.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 899281920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899281927) 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 15 ways as a sum of consecutive naturals, for example, 1950490 + ... + 1950950.

It is an arithmetic number, because the mean of its divisors is an integer number (16507008).

Almost surely, 2^899281920 is an apocalyptic number.

899281920 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 899281920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452616704).

899281920 is an abundant number, since it is smaller than the sum of its proper divisors (2005951488).

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

899281920 is a wasteful number, since it uses less digits than its factorization.

899281920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 899281920 is about 29988.0296118301. The cubic root of 899281920 is about 965.2325390183.

The spelling of 899281920 in words is "eight hundred ninety-nine million, two hundred eighty-one thousand, nine hundred twenty".