990889480 has 32 divisors (see below), whose sum is σ = 2548002240. Its totient is φ = 339733440.

The previous prime is 990889469. The next prime is 990889481. The reversal of 990889480 is 84988099.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (990889481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1769166 + ... + 1769725.

It is an arithmetic number, because the mean of its divisors is an integer number (79625070).

Almost surely, 2^990889480 is an apocalyptic number.

It is an amenable number.

990889480 is an abundant number, since it is smaller than the sum of its proper divisors (1557112760).

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

990889480 is a wasteful number, since it uses less digits than its factorization.

990889480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538909 (or 3538905 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 990889480 is about 31478.3970366980. The cubic root of 990889480 is about 996.9538906392.

The spelling of 990889480 in words is "nine hundred ninety million, eight hundred eighty-nine thousand, four hundred eighty".