2780270 has 16 divisors (see below), whose sum is σ = 5268240. Its totient is φ = 1053504.

The previous prime is 2780243. The next prime is 2780273. The reversal of 2780270 is 720872.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780273) 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, 7127 + ... + 7506.

It is an arithmetic number, because the mean of its divisors is an integer number (329265).

2^2780270 is an apocalyptic number.

2780270 is a deficient number, since it is larger than the sum of its proper divisors (2487970).

2780270 is a wasteful number, since it uses less digits than its factorization.

2780270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14659.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 2780270 is about 1667.4141657069. The cubic root of 2780270 is about 140.6141387496.

It can be divided in two parts, 27802 and 70, that added together give a palindrome (27872).

The spelling of 2780270 in words is "two million, seven hundred eighty thousand, two hundred seventy".