990885702840 has 384 divisors, whose sum is σ = 3421987430400. Its totient is φ = 228931225600.

The previous prime is 990885702797. The next prime is 990885702857. The reversal of 990885702840 is 48207588099.

It is a super-3 number, since 3×990885702840³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 93837481 + ... + 93848039.

It is an arithmetic number, because the mean of its divisors is an integer number (8911425600).

Almost surely, 2^990885702840 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 990885702840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710993715200).

990885702840 is an abundant number, since it is smaller than the sum of its proper divisors (2431101727560).

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

990885702840 is a wasteful number, since it uses less digits than its factorization.

990885702840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10899 (or 10884 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 990885702840 in words is "nine hundred ninety billion, eight hundred eighty-five million, seven hundred two thousand, eight hundred forty".