2609838 has 72 divisors (see below), whose sum is σ = 7202520. Its totient is φ = 675360.

The previous prime is 2609813. The next prime is 2609899. The reversal of 2609838 is 8389062.

It is a super-2 number, since 2×2609838² = 13622508772488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 9568 + ... + 9836.

It is an arithmetic number, because the mean of its divisors is an integer number (100035).

2^2609838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2609838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3601260).

2609838 is an abundant number, since it is smaller than the sum of its proper divisors (4592682).

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

2609838 is a wasteful number, since it uses less digits than its factorization.

2609838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2609838 is about 1615.4993036210. The cubic root of 2609838 is about 137.6801033838.

The spelling of 2609838 in words is "two million, six hundred nine thousand, eight hundred thirty-eight".