2646818 has 4 divisors (see below), whose sum is σ = 3970230. Its totient is φ = 1323408.

The previous prime is 2646803. The next prime is 2646841. The reversal of 2646818 is 8186462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2271049 + 375769 = 1507^2 + 613^2 .

It is a Curzon number.

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, 661703 + ... + 661706.

2^2646818 is an apocalyptic number.

2646818 is a deficient number, since it is larger than the sum of its proper divisors (1323412).

2646818 is a wasteful number, since it uses less digits than its factorization.

2646818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323411.

The product of its digits is 18432, while the sum is 35.

The square root of 2646818 is about 1626.9044225153. The cubic root of 2646818 is about 138.3273402671.

It can be divided in two parts, 2 and 646818, that multiplied together give a triangular number (1293636 = T₁₆₀₈).

The spelling of 2646818 in words is "two million, six hundred forty-six thousand, eight hundred eighteen".