2788425 has 54 divisors (see below), whose sum is σ = 5491278. Its totient is φ = 1399680.

The previous prime is 2788417. The next prime is 2788427. The reversal of 2788425 is 5248872.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 419904 + 2368521 = 648^2 + 1539^2 .

It is not a de Polignac number, because 2788425 - 2³ = 2788417 is a prime.

2788425 is a lucky number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 2788425.

It is not an unprimeable number, because it can be changed into a prime (2788427) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 164017 + ... + 164033.

2^2788425 is an apocalyptic number.

2788425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2788425 is a deficient number, since it is larger than the sum of its proper divisors (2702853).

2788425 is an frugal number, since it uses more digits than its factorization.

2788425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 25 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 2788425 is about 1669.8577783752. The cubic root of 2788425 is about 140.7514861969.

The spelling of 2788425 in words is "two million, seven hundred eighty-eight thousand, four hundred twenty-five".