990228744 has 24 divisors (see below), whose sum is σ = 2681869710. Its totient is φ = 330076224.

The previous prime is 990228727. The next prime is 990228769. The reversal of 990228744 is 447822099.

It can be written as a sum of positive squares in only one way, i.e., 770062500 + 220166244 = 27750^2 + 14838^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-4 number, since 4×990228744⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990228744.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6876517 + ... + 6876660.

Almost surely, 2^990228744 is an apocalyptic number.

It is an amenable number.

990228744 is an abundant number, since it is smaller than the sum of its proper divisors (1691640966).

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

990228744 is a wasteful number, since it uses less digits than its factorization.

990228744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753189 (or 13753182 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 990228744 is about 31467.9002159343. The cubic root of 990228744 is about 996.7322480954.

The spelling of 990228744 in words is "nine hundred ninety million, two hundred twenty-eight thousand, seven hundred forty-four".