2920645 has 32 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 1834560.

The previous prime is 2920637. The next prime is 2920649. The reversal of 2920645 is 5460292.

It is not a de Polignac number, because 2920645 - 2³ = 2920637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2920649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22230 + ... + 22360.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2^2920645 is an apocalyptic number.

It is an amenable number.

2920645 is a deficient number, since it is larger than the sum of its proper divisors (1514555).

2920645 is a wasteful number, since it uses less digits than its factorization.

2920645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2920645 is about 1708.9894674924. The cubic root of 2920645 is about 142.9419132593.

The spelling of 2920645 in words is "two million, nine hundred twenty thousand, six hundred forty-five".