2185749846 has 160 divisors (see below), whose sum is σ = 5885687808. Its totient is φ = 592764480.

The previous prime is 2185749833. The next prime is 2185749851. The reversal of 2185749846 is 6489475812.

It is a happy number.

2185749846 is a `hidden beast` number, since 21 + 8 + 574 + 9 + 8 + 46 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2185749792 and 2185749801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4720611 + ... + 4721073.

Almost surely, 2^2185749846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2185749846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2942843904).

2185749846 is an abundant number, since it is smaller than the sum of its proper divisors (3699937962).

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

2185749846 is a wasteful number, since it uses less digits than its factorization.

2185749846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 679 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 2185749846 is about 46752.0036575974. The cubic root of 2185749846 is about 1297.7772363584. Note that the first 3 decimals are identical.

The spelling of 2185749846 in words is "two billion, one hundred eighty-five million, seven hundred forty-nine thousand, eight hundred forty-six".