2628997 has 6 divisors (see below), whose sum is σ = 3058278. Its totient is φ = 2253384.

The previous prime is 2628979. The next prime is 2629001. The reversal of 2628997 is 7998262.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 988036 = 1281^2 + 994^2 .

It is not a de Polignac number, because 2628997 - 2¹⁵ = 2596229 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 6³ + 2¹⁹ + 8⁷ + 9³ + 9⁴ + 7² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26778 + ... + 26875.

It is an arithmetic number, because the mean of its divisors is an integer number (509713).

2^2628997 is an apocalyptic number.

It is an amenable number.

2628997 is a deficient number, since it is larger than the sum of its proper divisors (429281).

2628997 is an equidigital number, since it uses as much as digits as its factorization.

2628997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53667 (or 53660 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 2628997 is about 1621.4182063860. The cubic root of 2628997 is about 138.0161886771.

The spelling of 2628997 in words is "two million, six hundred twenty-eight thousand, nine hundred ninety-seven".