1985910696 has 192 divisors, whose sum is σ = 6954554880. Its totient is φ = 515782080.

The previous prime is 1985910679. The next prime is 1985910697. The reversal of 1985910696 is 6960195891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1985910697) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143055 + ... + 156321.

It is an arithmetic number, because the mean of its divisors is an integer number (36221640).

Almost surely, 2^1985910696 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 1985910696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3477277440).

1985910696 is an abundant number, since it is smaller than the sum of its proper divisors (4968644184).

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

1985910696 is a wasteful number, since it uses less digits than its factorization.

1985910696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306 (or 13290 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 1985910696 is about 44563.5579369511. The cubic root of 1985910696 is about 1256.9555067669.

The spelling of 1985910696 in words is "one billion, nine hundred eighty-five million, nine hundred ten thousand, six hundred ninety-six".