2920640 has 28 divisors (see below), whose sum is σ = 6955536. Its totient is φ = 1168128.

The previous prime is 2920637. The next prime is 2920649. The reversal of 2920640 is 460292.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244 + ... + 4883.

It is an arithmetic number, because the mean of its divisors is an integer number (248412).

2^2920640 is an apocalyptic number.

2920640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2920640 is an abundant number, since it is smaller than the sum of its proper divisors (4034896).

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

2920640 is an equidigital number, since it uses as much as digits as its factorization.

2920640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144 (or 9134 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2920640 is about 1708.9880046390. The cubic root of 2920640 is about 142.9418316895.

The spelling of 2920640 in words is "two million, nine hundred twenty thousand, six hundred forty".