2891328 has 84 divisors (see below), whose sum is σ = 8577072. Its totient is φ = 852480.

The previous prime is 2891323. The next prime is 2891341. The reversal of 2891328 is 8231982.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2891323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78126 + ... + 78162.

It is an arithmetic number, because the mean of its divisors is an integer number (102108).

2^2891328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4288536).

2891328 is an abundant number, since it is smaller than the sum of its proper divisors (5685744).

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

2891328 is a wasteful number, since it uses less digits than its factorization.

2891328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 53 counting only the distinct ones).

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

The square root of 2891328 is about 1700.3905433753. The cubic root of 2891328 is about 142.4620274322.

Multiplying 2891328 by its sum of digits (33), we get a square (95413824 = 9768²).

2891328 divided by its sum of digits (33) gives a square (87616 = 296²).

The spelling of 2891328 in words is "two million, eight hundred ninety-one thousand, three hundred twenty-eight".