2186377540 has 24 divisors (see below), whose sum is σ = 4593176280. Its totient is φ = 874211328.

The previous prime is 2186377411. The next prime is 2186377547. The reversal of 2186377540 is 457736812.

It can be written as a sum of positive squares in 4 ways, for example, as 1173610564 + 1012766976 = 34258^2 + 31824^2 .

It is not an unprimeable number, because it can be changed into a prime (2186377547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35206 + ... + 74914.

It is an arithmetic number, because the mean of its divisors is an integer number (191382345).

Almost surely, 2^2186377540 is an apocalyptic number.

2186377540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2186377540 is an abundant number, since it is smaller than the sum of its proper divisors (2406798740).

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

2186377540 is a wasteful number, since it uses less digits than its factorization.

2186377540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42471 (or 42469 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 2186377540 is about 46758.7161928127. The cubic root of 2186377540 is about 1297.9014544492.

The spelling of 2186377540 in words is "two billion, one hundred eighty-six million, three hundred seventy-seven thousand, five hundred forty".