2628665 has 16 divisors (see below), whose sum is σ = 3492048. Its totient is φ = 1886976.

The previous prime is 2628649. The next prime is 2628667. The reversal of 2628665 is 5668262.

It can be written as a sum of positive squares in 8 ways, for example, as 219961 + 2408704 = 469^2 + 1552^2 .

It is not a de Polignac number, because 2628665 - 2⁴ = 2628649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2628667) 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, 1859 + ... + 2951.

It is an arithmetic number, because the mean of its divisors is an integer number (218253).

2^2628665 is an apocalyptic number.

It is an amenable number.

2628665 is a deficient number, since it is larger than the sum of its proper divisors (863383).

2628665 is a wasteful number, since it uses less digits than its factorization.

2628665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 34560, while the sum is 35.

The square root of 2628665 is about 1621.3158236445. The cubic root of 2628665 is about 138.0103786915.

The spelling of 2628665 in words is "two million, six hundred twenty-eight thousand, six hundred sixty-five".