985191240 has 128 divisors (see below), whose sum is σ = 3231964800. Its totient is φ = 238264320.

The previous prime is 985191239. The next prime is 985191241. The reversal of 985191240 is 42191589.

985191240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (985191239) and next prime (985191241).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (985191241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 887806 + ... + 888914.

It is an arithmetic number, because the mean of its divisors is an integer number (25249725).

Almost surely, 2^985191240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985191240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615982400).

985191240 is an abundant number, since it is smaller than the sum of its proper divisors (2246773560).

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

985191240 is a wasteful number, since it uses less digits than its factorization.

985191240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 985191240 is about 31387.7562116186. The cubic root of 985191240 is about 995.0391776027.

The spelling of 985191240 in words is "nine hundred eighty-five million, one hundred ninety-one thousand, two hundred forty".