2840280 has 32 divisors (see below), whose sum is σ = 8521200. Its totient is φ = 757376.

The previous prime is 2840273. The next prime is 2840281. The reversal of 2840280 is 820482.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2840280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840281) 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, 11715 + ... + 11954.

2^2840280 is an apocalyptic number.

2840280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2840280 is an abundant number, since it is smaller than the sum of its proper divisors (5680920).

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

2840280 is a wasteful number, since it uses less digits than its factorization.

2840280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23683 (or 23679 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 2840280 is about 1685.3130273038. The cubic root of 2840280 is about 141.6186288492.

It can be divided in two parts, 28402 and 80, that added together give a palindrome (28482).

The spelling of 2840280 in words is "two million, eight hundred forty thousand, two hundred eighty".