2163478 has 8 divisors (see below), whose sum is σ = 3284568. Its totient is φ = 1068624.

The previous prime is 2163467. The next prime is 2163479. The reversal of 2163478 is 8743612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163479) 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, 6351 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (410571).

2^2163478 is an apocalyptic number.

2163478 is a deficient number, since it is larger than the sum of its proper divisors (1121090).

2163478 is a wasteful number, since it uses less digits than its factorization.

2163478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13118.

The product of its digits is 8064, while the sum is 31.

The square root of 2163478 is about 1470.8766093728. The cubic root of 2163478 is about 129.3354249730.

It can be divided in two parts, 21634 and 78, that added together give a palindrome (21712).

The spelling of 2163478 in words is "two million, one hundred sixty-three thousand, four hundred seventy-eight".