2798720 has 32 divisors (see below), whose sum is σ = 6692220. Its totient is φ = 1119232.

The previous prime is 2798713. The next prime is 2798729. The reversal of 2798720 is 278972.

It can be written as a sum of positive squares in 2 ways, for example, as 2795584 + 3136 = 1672^2 + 56^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (2798729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1547 + ... + 2826.

2^2798720 is an apocalyptic number.

2798720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2798720 is an abundant number, since it is smaller than the sum of its proper divisors (3893500).

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

2798720 is an equidigital number, since it uses as much as digits as its factorization.

2798720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392 (or 4380 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 2798720 is about 1672.9375361920. The cubic root of 2798720 is about 140.9244938859.

The spelling of 2798720 in words is "two million, seven hundred ninety-eight thousand, seven hundred twenty".