989502644 has 24 divisors (see below), whose sum is σ = 1867914888. Its totient is φ = 455938560.

The previous prime is 989502643. The next prime is 989502667. The reversal of 989502644 is 446205989.

It can be written as a sum of positive squares in 4 ways, for example, as 2788900 + 986713744 = 1670^2 + 31412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989502643) 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, 16664 + ... + 47504.

It is an arithmetic number, because the mean of its divisors is an integer number (77829787).

Almost surely, 2^989502644 is an apocalyptic number.

It is an amenable number.

989502644 is a deficient number, since it is larger than the sum of its proper divisors (878412244).

989502644 is a wasteful number, since it uses less digits than its factorization.

989502644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31475 (or 31473 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 989502644 is about 31456.3609465558. The cubic root of 989502644 is about 996.4885655939.

The spelling of 989502644 in words is "nine hundred eighty-nine million, five hundred two thousand, six hundred forty-four".