2857406 has 4 divisors (see below), whose sum is σ = 4286112. Its totient is φ = 1428702.

The previous prime is 2857403. The next prime is 2857417. The reversal of 2857406 is 6047582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714350 + ... + 714353.

It is an arithmetic number, because the mean of its divisors is an integer number (1071528).

2^2857406 is an apocalyptic number.

2857406 is a deficient number, since it is larger than the sum of its proper divisors (1428706).

2857406 is a wasteful number, since it uses less digits than its factorization.

2857406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428705.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2857406 is about 1690.3863463717. The cubic root of 2857406 is about 141.9026973424.

The spelling of 2857406 in words is "two million, eight hundred fifty-seven thousand, four hundred six".