2628440 has 32 divisors (see below), whose sum is σ = 6173280. Its totient is φ = 1005312.

The previous prime is 2628407. The next prime is 2628481. The reversal of 2628440 is 448262.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (192915).

2^2628440 is an apocalyptic number.

2628440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2628440 is an abundant number, since it is smaller than the sum of its proper divisors (3544840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2628440 is a wasteful number, since it uses less digits than its factorization.

2628440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 2628440 is about 1621.2464340747. The cubic root of 2628440 is about 138.0064409232.

The spelling of 2628440 in words is "two million, six hundred twenty-eight thousand, four hundred forty".