2780733 has 8 divisors (see below), whose sum is σ = 3715488. Its totient is φ = 1849904.

The previous prime is 2780719. The next prime is 2780753. The reversal of 2780733 is 3370872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2780733 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2780733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780753) 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 7 ways as a sum of consecutive naturals, for example, 1810 + ... + 2972.

It is an arithmetic number, because the mean of its divisors is an integer number (464436).

2^2780733 is an apocalyptic number.

It is an amenable number.

2780733 is a deficient number, since it is larger than the sum of its proper divisors (934755).

2780733 is a wasteful number, since it uses less digits than its factorization.

2780733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 2780733 is about 1667.5529976585. The cubic root of 2780733 is about 140.6219438348.

The spelling of 2780733 in words is "two million, seven hundred eighty thousand, seven hundred thirty-three".