2187403380 has 72 divisors (see below), whose sum is σ = 6880884192. Its totient is φ = 583306272.

The previous prime is 2187403343. The next prime is 2187403381. The reversal of 2187403380 is 833047812.

2187403380 is a `hidden beast` number, since 218 + 7 + 403 + 38 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187403381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220182 + ... + 229901.

It is an arithmetic number, because the mean of its divisors is an integer number (95567836).

Almost surely, 2^2187403380 is an apocalyptic number.

2187403380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187403380 is an abundant number, since it is smaller than the sum of its proper divisors (4693480812).

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

2187403380 is a wasteful number, since it uses less digits than its factorization.

2187403380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450107 (or 450093 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2187403380 is about 46769.6844120206. The cubic root of 2187403380 is about 1298.1044128469.

The spelling of 2187403380 in words is "two billion, one hundred eighty-seven million, four hundred three thousand, three hundred eighty".