2891538 has 40 divisors (see below), whose sum is σ = 6982668. Its totient is φ = 889056.

The previous prime is 2891527. The next prime is 2891543. The reversal of 2891538 is 8351982.

It can be written as a sum of positive squares in 2 ways, for example, as 2832489 + 59049 = 1683^2 + 243^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1420 + ... + 2792.

2^2891538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3491334).

2891538 is an abundant number, since it is smaller than the sum of its proper divisors (4091130).

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

2891538 is a wasteful number, since it uses less digits than its factorization.

2891538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400 (or 1391 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2891538 is about 1700.4522927739. The cubic root of 2891538 is about 142.4654764012.

The spelling of 2891538 in words is "two million, eight hundred ninety-one thousand, five hundred thirty-eight".