990228288 has 112 divisors (see below), whose sum is σ = 3090980864. Its totient is φ = 273784320.

The previous prime is 990228259. The next prime is 990228313. The reversal of 990228288 is 882822099.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29781 + ... + 53547.

Almost surely, 2^990228288 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 990228288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1545490432).

990228288 is an abundant number, since it is smaller than the sum of its proper divisors (2100752576).

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

990228288 is a wasteful number, since it uses less digits than its factorization.

990228288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23820 (or 23810 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 990228288 is about 31467.8929704548. The cubic root of 990228288 is about 996.7320950971.

The spelling of 990228288 in words is "nine hundred ninety million, two hundred twenty-eight thousand, two hundred eighty-eight".