985989144 has 64 divisors (see below), whose sum is σ = 2819715840. Its totient is φ = 281450880.

The previous prime is 985989143. The next prime is 985989149. The reversal of 985989144 is 441989589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985989143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248859 + ... + 252789.

It is an arithmetic number, because the mean of its divisors is an integer number (44058060).

Almost surely, 2^985989144 is an apocalyptic number.

It is an amenable number.

985989144 is an abundant number, since it is smaller than the sum of its proper divisors (1833726696).

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

985989144 is a wasteful number, since it uses less digits than its factorization.

985989144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440 (or 5436 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 57.

The square root of 985989144 is about 31400.4640730038. The cubic root of 985989144 is about 995.3077317222.

The spelling of 985989144 in words is "nine hundred eighty-five million, nine hundred eighty-nine thousand, one hundred forty-four".