2611998 has 36 divisors (see below), whose sum is σ = 5886504. Its totient is φ = 837000.

The previous prime is 2611997. The next prime is 2612003. The reversal of 2611998 is 8991162.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2611991) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17223 + ... + 17373.

It is an arithmetic number, because the mean of its divisors is an integer number (163514).

2^2611998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2611998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2943252).

2611998 is an abundant number, since it is smaller than the sum of its proper divisors (3274506).

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

2611998 is a wasteful number, since it uses less digits than its factorization.

2611998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 187 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 2611998 is about 1616.1676893194. The cubic root of 2611998 is about 137.7180759856.

The spelling of 2611998 in words is "two million, six hundred eleven thousand, nine hundred ninety-eight".