2798457 has 4 divisors (see below), whose sum is σ = 3731280. Its totient is φ = 1865636.

The previous prime is 2798449. The next prime is 2798459. The reversal of 2798457 is 7548972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2798457 - 2³ = 2798449 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2798459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466407 + ... + 466412.

It is an arithmetic number, because the mean of its divisors is an integer number (932820).

2^2798457 is an apocalyptic number.

It is an amenable number.

2798457 is a deficient number, since it is larger than the sum of its proper divisors (932823).

2798457 is an equidigital number, since it uses as much as digits as its factorization.

2798457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932822.

The product of its digits is 141120, while the sum is 42.

The square root of 2798457 is about 1672.8589300954. The cubic root of 2798457 is about 140.9200794508.

The spelling of 2798457 in words is "two million, seven hundred ninety-eight thousand, four hundred fifty-seven".