985031988 has 48 divisors (see below), whose sum is σ = 2318400000. Its totient is φ = 325500768.

The previous prime is 985031987. The next prime is 985031989. The reversal of 985031988 is 889130589.

It is an interprime number because it is at equal distance from previous prime (985031987) and next prime (985031989).

It is a self number, because there is not a number n which added to its sum of digits gives 985031988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985031981) 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, 1071393 + ... + 1072311.

It is an arithmetic number, because the mean of its divisors is an integer number (48300000).

Almost surely, 2^985031988 is an apocalyptic number.

It is an amenable number.

985031988 is an abundant number, since it is smaller than the sum of its proper divisors (1333368012).

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

985031988 is a wasteful number, since it uses less digits than its factorization.

985031988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 985031988 is about 31385.2192600275. The cubic root of 985031988 is about 994.9855600877.

The spelling of 985031988 in words is "nine hundred eighty-five million, thirty-one thousand, nine hundred eighty-eight".