2991312 has 30 divisors (see below), whose sum is σ = 8371922. Its totient is φ = 997056.

The previous prime is 2991299. The next prime is 2991353. The reversal of 2991312 is 2131992.

It can be written as a sum of positive squares in only one way, i.e., 2944656 + 46656 = 1716^2 + 216^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10243 + ... + 10530.

2^2991312 is an apocalyptic number.

It is an amenable number.

2991312 is an abundant number, since it is smaller than the sum of its proper divisors (5380610).

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

2991312 is a wasteful number, since it uses less digits than its factorization.

2991312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20787 (or 20778 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 2991312 is about 1729.5409795665. The cubic root of 2991312 is about 144.0855972569.

The spelling of 2991312 in words is "two million, nine hundred ninety-one thousand, three hundred twelve".