2628431 has 4 divisors (see below), whose sum is σ = 2830632. Its totient is φ = 2426232.

The previous prime is 2628407. The next prime is 2628481. The reversal of 2628431 is 1348262.

2628431 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: 1348262 = 2 ⋅674131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2628431 is a prime.

It is a super-2 number, since 2×2628431² = 13817299043522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2628431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628401) 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, 101081 + ... + 101106.

It is an arithmetic number, because the mean of its divisors is an integer number (707658).

2^2628431 is an apocalyptic number.

2628431 is a deficient number, since it is larger than the sum of its proper divisors (202201).

2628431 is a wasteful number, since it uses less digits than its factorization.

2628431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202200.

The product of its digits is 2304, while the sum is 26.

The square root of 2628431 is about 1621.2436584302. The cubic root of 2628431 is about 138.0062834078.

The spelling of 2628431 in words is "two million, six hundred twenty-eight thousand, four hundred thirty-one".