2857742 has 8 divisors (see below), whose sum is σ = 4309632. Its totient is φ = 1421200.

The previous prime is 2857721. The next prime is 2857753. The reversal of 2857742 is 2477582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 3359 + ... + 4122.

It is an arithmetic number, because the mean of its divisors is an integer number (538704).

2^2857742 is an apocalyptic number.

2857742 is a deficient number, since it is larger than the sum of its proper divisors (1451890).

2857742 is a wasteful number, since it uses less digits than its factorization.

2857742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674.

The product of its digits is 31360, while the sum is 35.

The square root of 2857742 is about 1690.4857290140. The cubic root of 2857742 is about 141.9082591979.

The spelling of 2857742 in words is "two million, eight hundred fifty-seven thousand, seven hundred forty-two".