985633884 has 18 divisors (see below), whose sum is σ = 2491463520. Its totient is φ = 328544616.

The previous prime is 985633879. The next prime is 985633889. The reversal of 985633884 is 488336589.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (985633879) and next prime (985633889).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 985633884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985633889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13689324 + ... + 13689395.

It is an arithmetic number, because the mean of its divisors is an integer number (138414640).

Almost surely, 2^985633884 is an apocalyptic number.

It is an amenable number.

985633884 is an abundant number, since it is smaller than the sum of its proper divisors (1505829636).

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

985633884 is a wasteful number, since it uses less digits than its factorization.

985633884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27378729 (or 27378724 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 985633884 is about 31394.8066405895. The cubic root of 985633884 is about 995.1881781744.

The spelling of 985633884 in words is "nine hundred eighty-five million, six hundred thirty-three thousand, eight hundred eighty-four".