2798240 has 24 divisors (see below), whose sum is σ = 6611220. Its totient is φ = 1119232.

The previous prime is 2798233. The next prime is 2798261. The reversal of 2798240 is 428972.

It can be written as a sum of positive squares in 2 ways, for example, as 2274064 + 524176 = 1508^2 + 724^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 2798197 and 2798206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8585 + ... + 8904.

2^2798240 is an apocalyptic number.

2798240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2798240 is an abundant number, since it is smaller than the sum of its proper divisors (3812980).

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

2798240 is a wasteful number, since it uses less digits than its factorization.

2798240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17504 (or 17496 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2798240 is about 1672.7940698125. The cubic root of 2798240 is about 140.9164369140.

The spelling of 2798240 in words is "two million, seven hundred ninety-eight thousand, two hundred forty".