990239448 has 64 divisors (see below), whose sum is σ = 2787793920. Its totient is φ = 290390400.

The previous prime is 990239441. The next prime is 990239491. The reversal of 990239448 is 844932099.

It is a junction number, because it is equal to n+sod(n) for n = 990239397 and 990239406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990239441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52315 + ... + 68682.

It is an arithmetic number, because the mean of its divisors is an integer number (43559280).

Almost surely, 2^990239448 is an apocalyptic number.

It is an amenable number.

990239448 is an abundant number, since it is smaller than the sum of its proper divisors (1797554472).

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

990239448 is a wasteful number, since it uses less digits than its factorization.

990239448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121048 (or 121044 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 990239448 is about 31468.0702935531. The cubic root of 990239448 is about 996.7358395159.

The spelling of 990239448 in words is "nine hundred ninety million, two hundred thirty-nine thousand, four hundred forty-eight".