2664858 has 32 divisors (see below), whose sum is σ = 6188544. Its totient is φ = 749232.

The previous prime is 2664847. The next prime is 2664859. The reversal of 2664858 is 8584662.

It is not an unprimeable number, because it can be changed into a prime (2664859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2341 + ... + 3287.

It is an arithmetic number, because the mean of its divisors is an integer number (193392).

2^2664858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2664858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3094272).

2664858 is an abundant number, since it is smaller than the sum of its proper divisors (3523686).

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

2664858 is a wasteful number, since it uses less digits than its factorization.

2664858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026.

The product of its digits is 92160, while the sum is 39.

The square root of 2664858 is about 1632.4392791158. The cubic root of 2664858 is about 138.6408962938.

The spelling of 2664858 in words is "two million, six hundred sixty-four thousand, eight hundred fifty-eight".