2809625 has 48 divisors (see below), whose sum is σ = 4567680. Its totient is φ = 1684800.

The previous prime is 2809619. The next prime is 2809627. The reversal of 2809625 is 5269082.

It is not a de Polignac number, because 2809625 - 2¹⁰ = 2808601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2809591 and 2809600.

It is not an unprimeable number, because it can be changed into a prime (2809627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147866 + ... + 147884.

It is an arithmetic number, because the mean of its divisors is an integer number (95160).

2^2809625 is an apocalyptic number.

2809625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2809625 is a deficient number, since it is larger than the sum of its proper divisors (1758055).

2809625 is a wasteful number, since it uses less digits than its factorization.

2809625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2809625 is about 1676.1936045696. The cubic root of 2809625 is about 141.1072905371.

It can be divided in two parts, 2809 and 625, that multiplied together give a square (1755625 = 1325²).

The spelling of 2809625 in words is "two million, eight hundred nine thousand, six hundred twenty-five".