2185290756 has 72 divisors (see below), whose sum is σ = 6154372224. Its totient is φ = 648114240.

The previous prime is 2185290749. The next prime is 2185290761. The reversal of 2185290756 is 6570925812.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40095 + ... + 77318.

It is an arithmetic number, because the mean of its divisors is an integer number (85477392).

Almost surely, 2^2185290756 is an apocalyptic number.

It is an amenable number.

2185290756 is an abundant number, since it is smaller than the sum of its proper divisors (3969081468).

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

2185290756 is a wasteful number, since it uses less digits than its factorization.

2185290756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117481 (or 117476 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 2185290756 is about 46747.0935567122. The cubic root of 2185290756 is about 1297.6863692553.

The spelling of 2185290756 in words is "two billion, one hundred eighty-five million, two hundred ninety thousand, seven hundred fifty-six".