2657886 has 48 divisors (see below), whose sum is σ = 6690432. Its totient is φ = 689040.

The previous prime is 2657867. The next prime is 2657887. The reversal of 2657886 is 6887562.

2657886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a d-powerful number, because it can be written as 2 + 6⁷ + 5 + 7³ + 8³ + 8⁷ + 6⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2657887) 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 23 ways as a sum of consecutive naturals, for example, 4821 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (139384).

2^2657886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2657886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3345216).

2657886 is an abundant number, since it is smaller than the sum of its proper divisors (4032546).

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

2657886 is a wasteful number, since it uses less digits than its factorization.

2657886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 546 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 2657886 is about 1630.3024259321. The cubic root of 2657886 is about 138.5198831512.

The spelling of 2657886 in words is "two million, six hundred fifty-seven thousand, eight hundred eighty-six".