990720000 has 390 divisors, whose sum is σ = 3659181812. Its totient is φ = 258048000.

The previous prime is 990719987. The next prime is 990720001. The reversal of 990720000 is 27099.

It is a super-2 number, since 2×990720000² = 1963052236800000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990720001) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 23039979 + ... + 23040021.

Almost surely, 2^990720000 is an apocalyptic number.

990720000 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 990720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1829590906).

990720000 is an abundant number, since it is smaller than the sum of its proper divisors (2668461812).

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

990720000 is an equidigital number, since it uses as much as digits as its factorization.

990720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 990720000 is about 31475.7049166496. The cubic root of 990720000 is about 996.8970483162.

Adding to 990720000 its reverse (27099), we get a palindrome (990747099).

The spelling of 990720000 in words is "nine hundred ninety million, seven hundred twenty thousand".