2187764940 has 48 divisors (see below), whose sum is σ = 6141800448. Its totient is φ = 581874624.

The previous prime is 2187764927. The next prime is 2187764941. The reversal of 2187764940 is 494677812.

It is a self number, because there is not a number n which added to its sum of digits gives 2187764940.

It is not an unprimeable number, because it can be changed into a prime (2187764941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24622 + ... + 70581.

It is an arithmetic number, because the mean of its divisors is an integer number (127954176).

Almost surely, 2^2187764940 is an apocalyptic number.

2187764940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187764940 is an abundant number, since it is smaller than the sum of its proper divisors (3954035508).

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

2187764940 is a wasteful number, since it uses less digits than its factorization.

2187764940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95598 (or 95596 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 2187764940 is about 46773.5495766571. The cubic root of 2187764940 is about 1298.1759309428.

The spelling of 2187764940 in words is "two billion, one hundred eighty-seven million, seven hundred sixty-four thousand, nine hundred forty".