989894745 has 48 divisors (see below), whose sum is σ = 1971320832. Its totient is φ = 450126720.

The previous prime is 989894687. The next prime is 989894747. The reversal of 989894745 is 547498989.

989894745 is a `hidden beast` number, since 9 + 89 + 89 + 474 + 5 = 666.

It is not a de Polignac number, because 989894745 - 2⁷ = 989894617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (989894747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51939 + ... + 68391.

It is an arithmetic number, because the mean of its divisors is an integer number (41069184).

Almost surely, 2^989894745 is an apocalyptic number.

It is an amenable number.

989894745 is a deficient number, since it is larger than the sum of its proper divisors (981426087).

989894745 is a wasteful number, since it uses less digits than its factorization.

989894745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662 (or 16659 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The square root of 989894745 is about 31462.5927888977. The cubic root of 989894745 is about 996.6201712941.

The spelling of 989894745 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, seven hundred forty-five".