2643894 has 32 divisors (see below), whose sum is σ = 6410880. Its totient is φ = 801000.

The previous prime is 2643889. The next prime is 2643899. The reversal of 2643894 is 4983462.

It is a happy number.

2643894 is a `hidden beast` number, since 2 + 643 + 8 + 9 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (2643889) and next prime (2643899).

It is a d-powerful number, because it can be written as 2 + 6³ + 4⁴ + 3¹³ + 8³ + 9 + 4¹⁰ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632 + ... + 2819.

It is an arithmetic number, because the mean of its divisors is an integer number (200340).

2^2643894 is an apocalyptic number.

2643894 is an abundant number, since it is smaller than the sum of its proper divisors (3766986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2643894 is a wasteful number, since it uses less digits than its factorization.

2643894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473 (or 4467 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2643894 is about 1626.0055350459. The cubic root of 2643894 is about 138.2763837127.

The spelling of 2643894 in words is "two million, six hundred forty-three thousand, eight hundred ninety-four".