1985109360 has 160 divisors (see below), whose sum is σ = 6976220160. Its totient is φ = 462910464.

The previous prime is 1985109349. The next prime is 1985109403. The reversal of 1985109360 is 639015891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42537 + ... + 76023.

It is an arithmetic number, because the mean of its divisors is an integer number (43601376).

Almost surely, 2^1985109360 is an apocalyptic number.

1985109360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985109360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3488110080).

1985109360 is an abundant number, since it is smaller than the sum of its proper divisors (4991110800).

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

1985109360 is a wasteful number, since it uses less digits than its factorization.

1985109360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33535 (or 33529 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1985109360 is about 44554.5660959682. The cubic root of 1985109360 is about 1256.7864190686.

The spelling of 1985109360 in words is "one billion, nine hundred eighty-five million, one hundred nine thousand, three hundred sixty".