2194688 has 18 divisors (see below), whose sum is σ = 4381314. Its totient is φ = 1097216.

The previous prime is 2194679. The next prime is 2194697. The reversal of 2194688 is 8864912.

It is an interprime number because it is at equal distance from previous prime (2194679) and next prime (2194697).

It can be written as a sum of positive squares in only one way, i.e., 1721344 + 473344 = 1312^2 + 688^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4031 + ... + 4542.

2^2194688 is an apocalyptic number.

It is an amenable number.

2194688 is a deficient number, since it is larger than the sum of its proper divisors (2186626).

2194688 is an frugal number, since it uses more digits than its factorization.

2194688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8589 (or 8575 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 2194688 is about 1481.4479403611. The cubic root of 2194688 is about 129.9543824165.

It can be divided in two parts, 2194 and 688, that added together give a palindrome (2882).

The spelling of 2194688 in words is "two million, one hundred ninety-four thousand, six hundred eighty-eight".