2195887640 has 16 divisors (see below), whose sum is σ = 4940747280. Its totient is φ = 878355040.

The previous prime is 2195887633. The next prime is 2195887663. The reversal of 2195887640 is 467885912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27448556 + ... + 27448635.

It is an arithmetic number, because the mean of its divisors is an integer number (308796705).

Almost surely, 2^2195887640 is an apocalyptic number.

2195887640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2195887640 is an abundant number, since it is smaller than the sum of its proper divisors (2744859640).

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

2195887640 is a wasteful number, since it uses less digits than its factorization.

2195887640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54897202 (or 54897198 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 2195887640 is about 46860.2991881187. The cubic root of 2195887640 is about 1299.7805625670.

The spelling of 2195887640 in words is "two billion, one hundred ninety-five million, eight hundred eighty-seven thousand, six hundred forty".