2928857 has 4 divisors (see below), whose sum is σ = 2933220. Its totient is φ = 2924496.

The previous prime is 2928851. The next prime is 2928881. The reversal of 2928857 is 7588292.

It is a happy number.

2928857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2062096 + 866761 = 1436^2 + 931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2928857 - 2¹⁴ = 2912473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2928851) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 938 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (733305).

2^2928857 is an apocalyptic number.

It is an amenable number.

2928857 is a deficient number, since it is larger than the sum of its proper divisors (4363).

2928857 is an equidigital number, since it uses as much as digits as its factorization.

2928857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362.

The product of its digits is 80640, while the sum is 41.

The square root of 2928857 is about 1711.3903704298. The cubic root of 2928857 is about 143.0757581855.

The spelling of 2928857 in words is "two million, nine hundred twenty-eight thousand, eight hundred fifty-seven".