2780280 has 48 divisors (see below), whose sum is σ = 9037080. Its totient is φ = 741312.

The previous prime is 2780273. The next prime is 2780303. The reversal of 2780280 is 820872.

2780280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2780280³ = 64474333529633856000, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3502 + ... + 4221.

2^2780280 is an apocalyptic number.

2780280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2780280 is an abundant number, since it is smaller than the sum of its proper divisors (6256800).

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

2780280 is a wasteful number, since it uses less digits than its factorization.

2780280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740 (or 7733 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 2780280 is about 1667.4171643593. The cubic root of 2780280 is about 140.6143073351.

The spelling of 2780280 in words is "two million, seven hundred eighty thousand, two hundred eighty".