990286444280 has 128 divisors (see below), whose sum is σ = 2683476449280. Its totient is φ = 321549043200.

The previous prime is 990286444253. The next prime is 990286444283. The reversal of 990286444280 is 82444682099.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990286444283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110804 + ... + 1411683.

It is an arithmetic number, because the mean of its divisors is an integer number (20964659760).

Almost surely, 2^990286444280 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 990286444280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341738224640).

990286444280 is an abundant number, since it is smaller than the sum of its proper divisors (1693190005000).

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

990286444280 is a wasteful number, since it uses less digits than its factorization.

990286444280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522629 (or 1522625 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 990286444280 in words is "nine hundred ninety billion, two hundred eighty-six million, four hundred forty-four thousand, two hundred eighty".