899619840 has 264 divisors, whose sum is σ = 3563745120. Its totient is φ = 205553664.

The previous prime is 899619823. The next prime is 899619857. The reversal of 899619840 is 48916998.

It is an interprime number because it is at equal distance from previous prime (899619823) and next prime (899619857).

It is a super-3 number, since 3×899619840³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 321166 + ... + 323954.

Almost surely, 2^899619840 is an apocalyptic number.

899619840 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 899619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781872560).

899619840 is an abundant number, since it is smaller than the sum of its proper divisors (2664125280).

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

899619840 is a wasteful number, since it uses less digits than its factorization.

899619840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 899619840 is about 29993.6633307771. The cubic root of 899619840 is about 965.3534245553.

The spelling of 899619840 in words is "eight hundred ninety-nine million, six hundred nineteen thousand, eight hundred forty".