2147864 has 16 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 1069600.

The previous prime is 2147863. The next prime is 2147869. The reversal of 2147864 is 4687412.

It is a super-2 number, since 2×2147864² = 9226639524992, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 4⁴ + 7 + 8⁵ + 6⁴ + 4⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 2147864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2714 + ... + 3414.

It is an arithmetic number, because the mean of its divisors is an integer number (252720).

2^2147864 is an apocalyptic number.

It is an amenable number.

2147864 is a deficient number, since it is larger than the sum of its proper divisors (1895656).

2147864 is a wasteful number, since it uses less digits than its factorization.

2147864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1086 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 2147864 is about 1465.5592789103. The cubic root of 2147864 is about 129.0235319529.

The spelling of 2147864 in words is "two million, one hundred forty-seven thousand, eight hundred sixty-four".