2891238 has 64 divisors (see below), whose sum is σ = 7160832. Its totient is φ = 760320.

The previous prime is 2891237. The next prime is 2891243. The reversal of 2891238 is 8321982.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2891199 and 2891208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39570 + ... + 39642.

It is an arithmetic number, because the mean of its divisors is an integer number (111888).

2^2891238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3580416).

2891238 is an abundant number, since it is smaller than the sum of its proper divisors (4269594).

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

2891238 is a wasteful number, since it uses less digits than its factorization.

2891238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 6912, while the sum is 33.

The square root of 2891238 is about 1700.3640786608. The cubic root of 2891238 is about 142.4605492515.

The spelling of 2891238 in words is "two million, eight hundred ninety-one thousand, two hundred thirty-eight".