2599998 has 16 divisors (see below), whose sum is σ = 5473920. Its totient is φ = 821016.

The previous prime is 2599991. The next prime is 2599999. The reversal of 2599998 is 8999952.

It is a self number, because there is not a number n which added to its sum of digits gives 2599998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2599991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11290 + ... + 11517.

It is an arithmetic number, because the mean of its divisors is an integer number (342120).

2^2599998 is an apocalyptic number.

2599998 is an abundant number, since it is smaller than the sum of its proper divisors (2873922).

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

2599998 is a wasteful number, since it uses less digits than its factorization.

2599998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22831.

The product of its digits is 524880, while the sum is 51.

The square root of 2599998 is about 1612.4509294859. The cubic root of 2599998 is about 137.5068514492.

The spelling of 2599998 in words is "two million, five hundred ninety-nine thousand, nine hundred ninety-eight".