2780363 has 4 divisors (see below), whose sum is σ = 2798928. Its totient is φ = 2761800.

The previous prime is 2780357. The next prime is 2780369. The reversal of 2780363 is 3630872.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2780357) and next prime (2780369).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2780363 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9056 + ... + 9357.

It is an arithmetic number, because the mean of its divisors is an integer number (699732).

2^2780363 is an apocalyptic number.

2780363 is a deficient number, since it is larger than the sum of its proper divisors (18565).

2780363 is a wasteful number, since it uses less digits than its factorization.

2780363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18564.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 2780363 is about 1667.4420529662. The cubic root of 2780363 is about 140.6157065793.

The spelling of 2780363 in words is "two million, seven hundred eighty thousand, three hundred sixty-three".