2499999858 has 48 divisors (see below), whose sum is σ = 5657034240. Its totient is φ = 796416192.

The previous prime is 2499999857. The next prime is 2499999863. The reversal of 2499999858 is 8589999942.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2499999851) 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, 726510 + ... + 729942.

It is an arithmetic number, because the mean of its divisors is an integer number (117854880).

Almost surely, 2^2499999858 is an apocalyptic number.

2499999858 is an abundant number, since it is smaller than the sum of its proper divisors (3157034382).

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

2499999858 is a wasteful number, since it uses less digits than its factorization.

2499999858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223 (or 5220 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 72.

The square root of 2499999858 is about 49999.9985800000. The cubic root of 2499999858 is about 1357.2087826010.

The spelling of 2499999858 in words is "two billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred fifty-eight".