2628557 has 4 divisors (see below), whose sum is σ = 2783196. Its totient is φ = 2473920.

The previous prime is 2628553. The next prime is 2628559. The reversal of 2628557 is 7558262.

2628557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7558262 = 2 ⋅3779131.

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 470596 = 1469^2 + 686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628557 - 2² = 2628553 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 6⁷ + 2¹² + 8³ + 5⁸ + 5⁹ + 7 .

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77294 + ... + 77327.

It is an arithmetic number, because the mean of its divisors is an integer number (695799).

2^2628557 is an apocalyptic number.

It is an amenable number.

2628557 is a deficient number, since it is larger than the sum of its proper divisors (154639).

2628557 is a wasteful number, since it uses less digits than its factorization.

2628557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154638.

The product of its digits is 33600, while the sum is 35.

The square root of 2628557 is about 1621.2825170216. The cubic root of 2628557 is about 138.0084885908.

The spelling of 2628557 in words is "two million, six hundred twenty-eight thousand, five hundred fifty-seven".