2185491492 has 144 divisors (see below), whose sum is σ = 5972162560. Its totient is φ = 671799744.

The previous prime is 2185491481. The next prime is 2185491523. The reversal of 2185491492 is 2941945812.

It is a happy number.

2185491492 is a `hidden beast` number, since 2 + 1 + 8 + 549 + 14 + 92 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4720053 + ... + 4720515.

Almost surely, 2^2185491492 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 2185491492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2986081280).

2185491492 is an abundant number, since it is smaller than the sum of its proper divisors (3786671068).

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

2185491492 is a wasteful number, since it uses less digits than its factorization.

2185491492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 657 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2185491492 is about 46749.2405499811. The cubic root of 2185491492 is about 1297.7261022435.

The spelling of 2185491492 in words is "two billion, one hundred eighty-five million, four hundred ninety-one thousand, four hundred ninety-two".