2891648 has 64 divisors (see below), whose sum is σ = 6426000. Its totient is φ = 1290240.

The previous prime is 2891639. The next prime is 2891657. The reversal of 2891648 is 8461982.

It is an interprime number because it is at equal distance from previous prime (2891639) and next prime (2891657).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70508 + ... + 70548.

2^2891648 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 2891648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3213000).

2891648 is an abundant number, since it is smaller than the sum of its proper divisors (3534352).

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

2891648 is a wasteful number, since it uses less digits than its factorization.

2891648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 91 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 2891648 is about 1700.4846368021. The cubic root of 2891648 is about 142.4672829373.

The spelling of 2891648 in words is "two million, eight hundred ninety-one thousand, six hundred forty-eight".