989915894 has 8 divisors (see below), whose sum is σ = 1619862408. Its totient is φ = 449961760.

The previous prime is 989915893. The next prime is 989915897. The reversal of 989915894 is 498519989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989915893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22498067 + ... + 22498110.

It is an arithmetic number, because the mean of its divisors is an integer number (202482801).

Almost surely, 2^989915894 is an apocalyptic number.

989915894 is a deficient number, since it is larger than the sum of its proper divisors (629946514).

989915894 is a wasteful number, since it uses less digits than its factorization.

989915894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44996190.

The product of its digits is 8398080, while the sum is 62.

The square root of 989915894 is about 31462.9288846414. The cubic root of 989915894 is about 996.6272688063.

The spelling of 989915894 in words is "nine hundred eighty-nine million, nine hundred fifteen thousand, eight hundred ninety-four".