990449694 has 40 divisors (see below), whose sum is σ = 2390064600. Its totient is φ = 304753104.

The previous prime is 990449693. The next prime is 990449701. The reversal of 990449694 is 496944099.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 990449694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990449693) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 233044 + ... + 237255.

It is an arithmetic number, because the mean of its divisors is an integer number (59751615).

Almost surely, 2^990449694 is an apocalyptic number.

990449694 is an abundant number, since it is smaller than the sum of its proper divisors (1399614906).

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

990449694 is a wasteful number, since it uses less digits than its factorization.

990449694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470326 (or 470317 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 990449694 is about 31471.4107405436. The cubic root of 990449694 is about 996.8063762918.

The spelling of 990449694 in words is "nine hundred ninety million, four hundred forty-nine thousand, six hundred ninety-four".