990989240 has 16 divisors (see below), whose sum is σ = 2229725880. Its totient is φ = 396395680.

The previous prime is 990989239. The next prime is 990989257. The reversal of 990989240 is 42989099.

990989240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12387326 + ... + 12387405.

Almost surely, 2^990989240 is an apocalyptic number.

It is an amenable number.

990989240 is an abundant number, since it is smaller than the sum of its proper divisors (1238736640).

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

990989240 is a wasteful number, since it uses less digits than its factorization.

990989240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24774742 (or 24774738 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 990989240 is about 31479.9815755982. The cubic root of 990989240 is about 996.9873463658.

The spelling of 990989240 in words is "nine hundred ninety million, nine hundred eighty-nine thousand, two hundred forty".