2628641 has 4 divisors (see below), whose sum is σ = 2678292. Its totient is φ = 2578992.

The previous prime is 2628617. The next prime is 2628649. The reversal of 2628641 is 1468262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1468262 = 2 ⋅734131.

It can be written as a sum of positive squares in 2 ways, for example, as 883600 + 1745041 = 940^2 + 1321^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628641 - 2¹⁰ = 2627617 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁴ + 2²¹ + 8³ + 6⁴ + 4⁶ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2628649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24746 + ... + 24851.

It is an arithmetic number, because the mean of its divisors is an integer number (669573).

2^2628641 is an apocalyptic number.

It is an amenable number.

2628641 is a deficient number, since it is larger than the sum of its proper divisors (49651).

2628641 is an equidigital number, since it uses as much as digits as its factorization.

2628641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49650.

The product of its digits is 4608, while the sum is 29.

The square root of 2628641 is about 1621.3084222319. The cubic root of 2628641 is about 138.0099586736.

The spelling of 2628641 in words is "two million, six hundred twenty-eight thousand, six hundred forty-one".