990038700 has 360 divisors, whose sum is σ = 3865030400. Its totient is φ = 214151040.

The previous prime is 990038689. The next prime is 990038701. The reversal of 990038700 is 7830099.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (990038701) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1076841 + ... + 1077759.

Almost surely, 2^990038700 is an apocalyptic number.

990038700 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 990038700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1932515200).

990038700 is an abundant number, since it is smaller than the sum of its proper divisors (2874991700).

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

990038700 is a wasteful number, since it uses less digits than its factorization.

990038700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 990038700 is about 31464.8804224647. The cubic root of 990038700 is about 996.6684799665.

Adding to 990038700 its reverse (7830099), we get a palindrome (997868799).

The spelling of 990038700 in words is "nine hundred ninety million, thirty-eight thousand, seven hundred".