2185054840 has 32 divisors (see below), whose sum is σ = 5074968960. Its totient is φ = 845827200.

The previous prime is 2185054801. The next prime is 2185054877. The reversal of 2185054840 is 484505812.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2185054840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879831 + ... + 882310.

It is an arithmetic number, because the mean of its divisors is an integer number (158592780).

Almost surely, 2^2185054840 is an apocalyptic number.

2185054840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185054840 is an abundant number, since it is smaller than the sum of its proper divisors (2889914120).

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

2185054840 is a wasteful number, since it uses less digits than its factorization.

2185054840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762183 (or 1762179 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 37.

The square root of 2185054840 is about 46744.5701659562. The cubic root of 2185054840 is about 1297.6396697495.

The spelling of 2185054840 in words is "two billion, one hundred eighty-five million, fifty-four thousand, eight hundred forty".