2991648 has 48 divisors (see below), whose sum is σ = 8570016. Its totient is φ = 906240.

The previous prime is 2991631. The next prime is 2991649. The reversal of 2991648 is 8461992.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (2991649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 2472.

It is an arithmetic number, because the mean of its divisors is an integer number (178542).

2^2991648 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 2991648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4285008).

2991648 is an abundant number, since it is smaller than the sum of its proper divisors (5578368).

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

2991648 is a wasteful number, since it uses less digits than its factorization.

2991648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857 (or 2849 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 2991648 is about 1729.6381124386. The cubic root of 2991648 is about 144.0909918739.

The spelling of 2991648 in words is "two million, nine hundred ninety-one thousand, six hundred forty-eight".