990533700 has 216 divisors, whose sum is σ = 3452723456. Its totient is φ = 235872000.

The previous prime is 990533689. The next prime is 990533717. The reversal of 990533700 is 7335099.

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 71 ways as a sum of consecutive naturals, for example, 361335 + ... + 364065.

Almost surely, 2^990533700 is an apocalyptic number.

990533700 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 990533700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726361728).

990533700 is an abundant number, since it is smaller than the sum of its proper divisors (2462189756).

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

990533700 is a wasteful number, since it uses less digits than its factorization.

990533700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795 (or 2785 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 990533700 is about 31472.7453521297. The cubic root of 990533700 is about 996.8345572112.

Adding to 990533700 its reverse (7335099), we get a palindrome (997868799).

The spelling of 990533700 in words is "nine hundred ninety million, five hundred thirty-three thousand, seven hundred".