2186387948 has 6 divisors (see below), whose sum is σ = 3826178916. Its totient is φ = 1093193972.

The previous prime is 2186387941. The next prime is 2186387993. The reversal of 2186387948 is 8497836812.

It is a junction number, because it is equal to n+sod(n) for n = 2186387893 and 2186387902.

It is not an unprimeable number, because it can be changed into a prime (2186387941) 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 as a sum of consecutive naturals, namely, 273298490 + ... + 273298497.

It is an arithmetic number, because the mean of its divisors is an integer number (637696486).

Almost surely, 2^2186387948 is an apocalyptic number.

It is an amenable number.

2186387948 is a deficient number, since it is larger than the sum of its proper divisors (1639790968).

2186387948 is a wasteful number, since it uses less digits than its factorization.

2186387948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546596991 (or 546596989 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 56.

The square root of 2186387948 is about 46758.8274874381. The cubic root of 2186387948 is about 1297.9035139497.

The spelling of 2186387948 in words is "two billion, one hundred eighty-six million, three hundred eighty-seven thousand, nine hundred forty-eight".