2646889 has 4 divisors (see below), whose sum is σ = 3025024. Its totient is φ = 2268756.

The previous prime is 2646887. The next prime is 2646893. The reversal of 2646889 is 9886462.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2646889 - 2¹ = 2646887 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 6⁶ + 4⁴ + 6⁷ + 8⁵ + 8⁷ + 9⁵ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189057 + ... + 189070.

It is an arithmetic number, because the mean of its divisors is an integer number (756256).

2^2646889 is an apocalyptic number.

It is an amenable number.

2646889 is a deficient number, since it is larger than the sum of its proper divisors (378135).

2646889 is an equidigital number, since it uses as much as digits as its factorization.

2646889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378134.

The product of its digits is 165888, while the sum is 43.

The square root of 2646889 is about 1626.9262429502. The cubic root of 2646889 is about 138.3285771175.

The spelling of 2646889 in words is "two million, six hundred forty-six thousand, eight hundred eighty-nine".