2923840 has 28 divisors (see below), whose sum is σ = 6963156. Its totient is φ = 1169408.

The previous prime is 2923831. The next prime is 2923859. The reversal of 2923840 is 483292.

It can be written as a sum of positive squares in 2 ways, for example, as 389376 + 2534464 = 624^2 + 1592^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2923799 and 2923808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4249 + ... + 4888.

2^2923840 is an apocalyptic number.

2923840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2923840 is an abundant number, since it is smaller than the sum of its proper divisors (4039316).

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

2923840 is an equidigital number, since it uses as much as digits as its factorization.

2923840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9154 (or 9144 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2923840 is about 1709.9239749182. The cubic root of 2923840 is about 142.9940173871.

The spelling of 2923840 in words is "two million, nine hundred twenty-three thousand, eight hundred forty".