2656489 has 16 divisors (see below), whose sum is σ = 3053376. Its totient is φ = 2289600.

The previous prime is 2656457. The next prime is 2656499. The reversal of 2656489 is 9846562.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2656489 - 2⁵ = 2656457 is a prime.

It is a Duffinian number.

Its product of digits (103680) is a multiple of the sum of its prime divisors (216).

2656489 is a lucky number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2656499) 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, 24774 + ... + 24880.

It is an arithmetic number, because the mean of its divisors is an integer number (190836).

2^2656489 is an apocalyptic number.

It is an amenable number.

2656489 is a deficient number, since it is larger than the sum of its proper divisors (396887).

2656489 is a wasteful number, since it uses less digits than its factorization.

2656489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216.

The product of its digits is 103680, while the sum is 40.

The square root of 2656489 is about 1629.8739215044. The cubic root of 2656489 is about 138.4956099518.

It can be divided in two parts, 265 and 6489, that multiplied together give a triangular number (1719585 = T₁₈₅₄).

The spelling of 2656489 in words is "two million, six hundred fifty-six thousand, four hundred eighty-nine".