2499858 has 24 divisors (see below), whose sum is σ = 5604300. Its totient is φ = 804384.

The previous prime is 2499853. The next prime is 2499859. The reversal of 2499858 is 8589942.

It can be written as a sum of positive squares in 2 ways, for example, as 2350089 + 149769 = 1533^2 + 387^2 .

It is not an unprimeable number, because it can be changed into a prime (2499853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1873 + ... + 2916.

2^2499858 is an apocalyptic number.

2499858 is an abundant number, since it is smaller than the sum of its proper divisors (3104442).

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

2499858 is a wasteful number, since it uses less digits than its factorization.

2499858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4823 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2499858 is about 1581.0939251038. The cubic root of 2499858 is about 135.7183111324.

The spelling of 2499858 in words is "two million, four hundred ninety-nine thousand, eight hundred fifty-eight".