990043560 has 160 divisors (see below), whose sum is σ = 3630290400. Its totient is φ = 240001920.

The previous prime is 990043547. The next prime is 990043577. The reversal of 990043560 is 65340099.

990043560 is a `hidden beast` number, since 9 + 90 + 0 + 4 + 3 + 560 = 666.

990043560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21751 + ... + 49529.

It is an arithmetic number, because the mean of its divisors is an integer number (22689315).

Almost surely, 2^990043560 is an apocalyptic number.

990043560 is a gapful number since it is divisible by the number (90) 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 990043560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1815145200).

990043560 is an abundant number, since it is smaller than the sum of its proper divisors (2640246840).

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

990043560 is a wasteful number, since it uses less digits than its factorization.

990043560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27813 (or 27800 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 990043560 is about 31464.9576513302. The cubic root of 990043560 is about 996.6701108121.

The spelling of 990043560 in words is "nine hundred ninety million, forty-three thousand, five hundred sixty".