899955420 has 288 divisors, whose sum is σ = 3226890240. Its totient is φ = 183306240.

The previous prime is 899955409. The next prime is 899955421. The reversal of 899955420 is 24559998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899955421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2200176 + ... + 2200584.

It is an arithmetic number, because the mean of its divisors is an integer number (11204480).

Almost surely, 2^899955420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 899955420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1613445120).

899955420 is an abundant number, since it is smaller than the sum of its proper divisors (2326934820).

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

899955420 is a wasteful number, since it uses less digits than its factorization.

899955420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 899955420 is about 29999.2569907990. The cubic root of 899955420 is about 965.4734430399.

The spelling of 899955420 in words is "eight hundred ninety-nine million, nine hundred fifty-five thousand, four hundred twenty".