2186391448 has 8 divisors (see below), whose sum is σ = 4099483980. Its totient is φ = 1093195720.

The previous prime is 2186391443. The next prime is 2186391451. The reversal of 2186391448 is 8441936812.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2186391398 and 2186391407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186391443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136649458 + ... + 136649473.

Almost surely, 2^2186391448 is an apocalyptic number.

It is an amenable number.

2186391448 is a deficient number, since it is larger than the sum of its proper divisors (1913092532).

2186391448 is a wasteful number, since it uses less digits than its factorization.

2186391448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273298937 (or 273298933 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 2186391448 is about 46758.8649135113. The cubic root of 2186391448 is about 1297.9042065166.

It can be divided in two parts, 21863 and 91448, that added together give a palindrome (113311).

The spelling of 2186391448 in words is "two billion, one hundred eighty-six million, three hundred ninety-one thousand, four hundred forty-eight".