2187280340 has 48 divisors (see below), whose sum is σ = 5430499200. Its totient is φ = 724063872.

The previous prime is 2187280339. The next prime is 2187280343. The reversal of 2187280340 is 430827812.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 2187280340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187280343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265310 + ... + 273429.

It is an arithmetic number, because the mean of its divisors is an integer number (113135400).

Almost surely, 2^2187280340 is an apocalyptic number.

2187280340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187280340 is an abundant number, since it is smaller than the sum of its proper divisors (3243218860).

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

2187280340 is a wasteful number, since it uses less digits than its factorization.

2187280340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538784 (or 538782 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 2187280340 is about 46768.3690115445. The cubic root of 2187280340 is about 1298.0800732177.

The spelling of 2187280340 in words is "two billion, one hundred eighty-seven million, two hundred eighty thousand, three hundred forty".