2991856 has 20 divisors (see below), whose sum is σ = 6625072. Its totient is φ = 1282176.

The previous prime is 2991853. The next prime is 2991871. The reversal of 2991856 is 6581992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13245 + ... + 13468.

2^2991856 is an apocalyptic number.

It is an amenable number.

2991856 is an abundant number, since it is smaller than the sum of its proper divisors (3633216).

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

2991856 is a wasteful number, since it uses less digits than its factorization.

2991856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26728 (or 26722 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 2991856 is about 1729.6982395782. The cubic root of 2991856 is about 144.0943311964.

The spelling of 2991856 in words is "two million, nine hundred ninety-one thousand, eight hundred fifty-six".