990532800 has 210 divisors, whose sum is σ = 3641425788. Its totient is φ = 264107520.

The previous prime is 990532799. The next prime is 990532811. The reversal of 990532800 is 8235099.

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 29 ways as a sum of consecutive naturals, for example, 125779 + ... + 133421.

Almost surely, 2^990532800 is an apocalyptic number.

990532800 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 990532800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1820712894).

990532800 is an abundant number, since it is smaller than the sum of its proper divisors (2650892988).

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

990532800 is a wasteful number, since it uses less digits than its factorization.

990532800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7677 (or 7653 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 990532800 is about 31472.7310540411. The cubic root of 990532800 is about 996.8342553028.

Adding to 990532800 its reverse (8235099), we get a palindrome (998767899).

The spelling of 990532800 in words is "nine hundred ninety million, five hundred thirty-two thousand, eight hundred".