899838720 has 432 divisors, whose sum is σ = 3535564032. Its totient is φ = 217313280.

The previous prime is 899838701. The next prime is 899838739. The reversal of 899838720 is 27838998.

It is an interprime number because it is at equal distance from previous prime (899838701) and next prime (899838739).

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×899838720² = 1619419444022476800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3421309 + ... + 3421571.

It is an arithmetic number, because the mean of its divisors is an integer number (8184176).

Almost surely, 2^899838720 is an apocalyptic number.

899838720 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 899838720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1767782016).

899838720 is an abundant number, since it is smaller than the sum of its proper divisors (2635725312).

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

899838720 is a wasteful number, since it uses less digits than its factorization.

899838720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 899838720 is about 29997.3118795668. The cubic root of 899838720 is about 965.4317092611.

The spelling of 899838720 in words is "eight hundred ninety-nine million, eight hundred thirty-eight thousand, seven hundred twenty".