990993308928 has 288 divisors, whose sum is σ = 3101797144320. Its totient is φ = 274949406720.

The previous prime is 990993308923. The next prime is 990993308939. The reversal of 990993308928 is 829803399099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990993308923) 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, 107606788 + ... + 107615996.

Almost surely, 2^990993308928 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 990993308928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550898572160).

990993308928 is an abundant number, since it is smaller than the sum of its proper divisors (2110803835392).

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

990993308928 is a wasteful number, since it uses less digits than its factorization.

990993308928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813 (or 9799 counting only the distinct ones).

The product of its (nonzero) digits is 68024448, while the sum is 69.

It can be divided in two parts, 990993 and 308928, that added together give a palindrome (1299921).

The spelling of 990993308928 in words is "nine hundred ninety billion, nine hundred ninety-three million, three hundred eight thousand, nine hundred twenty-eight".