2780143 has 8 divisors (see below), whose sum is σ = 2954880. Its totient is φ = 2610720.

The previous prime is 2780131. The next prime is 2780149. The reversal of 2780143 is 3410872.

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

It is not a de Polignac number, because 2780143 - 2⁹ = 2779631 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (369360).

2^2780143 is an apocalyptic number.

2780143 is a deficient number, since it is larger than the sum of its proper divisors (174737).

2780143 is a wasteful number, since it uses less digits than its factorization.

2780143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2780143 is about 1667.3760823521. The cubic root of 2780143 is about 140.6119976785.

The spelling of 2780143 in words is "two million, seven hundred eighty thousand, one hundred forty-three".