2628931 has 4 divisors (see below), whose sum is σ = 2783592. Its totient is φ = 2474272.

The previous prime is 2628919. The next prime is 2628953. The reversal of 2628931 is 1398262.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2628931 - 2¹⁵ = 2596163 is a prime.

It is a super-2 number, since 2×2628931² = 13822556405522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2⁵ + 6³ + 2²¹ + 8 + 9² + 3¹² + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2628893 and 2628902.

It is not an unprimeable number, because it can be changed into a prime (2628911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77305 + ... + 77338.

It is an arithmetic number, because the mean of its divisors is an integer number (695898).

2^2628931 is an apocalyptic number.

2628931 is a deficient number, since it is larger than the sum of its proper divisors (154661).

2628931 is a wasteful number, since it uses less digits than its factorization.

2628931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154660.

The product of its digits is 5184, while the sum is 31.

The square root of 2628931 is about 1621.3978537053. The cubic root of 2628931 is about 138.0150337189.

The spelling of 2628931 in words is "two million, six hundred twenty-eight thousand, nine hundred thirty-one".