2856438 has 48 divisors (see below), whose sum is σ = 6895440. Its totient is φ = 876096.

The previous prime is 2856431. The next prime is 2856449. The reversal of 2856438 is 8346582.

2856438 is a `hidden beast` number, since 2 + 8 + 5 + 643 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8970 + ... + 9282.

It is an arithmetic number, because the mean of its divisors is an integer number (143655).

2^2856438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2856438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3447720).

2856438 is an abundant number, since it is smaller than the sum of its proper divisors (4039002).

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

2856438 is a wasteful number, since it uses less digits than its factorization.

2856438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 331 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 2856438 is about 1690.0999970416. The cubic root of 2856438 is about 141.8866714638.

The spelling of 2856438 in words is "two million, eight hundred fifty-six thousand, four hundred thirty-eight".