989849690 has 16 divisors (see below), whose sum is σ = 1784048328. Its totient is φ = 395424576.

The previous prime is 989849687. The next prime is 989849711. The reversal of 989849690 is 96948989.

It can be written as a sum of positive squares in 4 ways, for example, as 650811121 + 339038569 = 25511^2 + 18413^2 .

It is a super-2 number, since 2×989849690² = 1959604817586192200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56297 + ... + 71756.

Almost surely, 2^989849690 is an apocalyptic number.

989849690 is a deficient number, since it is larger than the sum of its proper divisors (794198638).

989849690 is a wasteful number, since it uses less digits than its factorization.

989849690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128833.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The square root of 989849690 is about 31461.8767717376. The cubic root of 989849690 is about 996.6050506956.

The spelling of 989849690 in words is "nine hundred eighty-nine million, eight hundred forty-nine thousand, six hundred ninety".