2858440 has 64 divisors (see below), whose sum is σ = 7257600. Its totient is φ = 1005312.

The previous prime is 2858423. The next prime is 2858441. The reversal of 2858440 is 448582.

It is not an unprimeable number, because it can be changed into a prime (2858441) 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, 11841 + ... + 12079.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2^2858440 is an apocalyptic number.

2858440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2858440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3628800).

2858440 is an abundant number, since it is smaller than the sum of its proper divisors (4399160).

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

2858440 is a wasteful number, since it uses less digits than its factorization.

2858440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 2858440 is about 1690.6921659486. The cubic root of 2858440 is about 141.9198118971.

The spelling of 2858440 in words is "two million, eight hundred fifty-eight thousand, four hundred forty".