2991456 has 144 divisors (see below), whose sum is σ = 9906624. Its totient is φ = 847872.

The previous prime is 2991451. The next prime is 2991463. The reversal of 2991456 is 6541992.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2991456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63625 + ... + 63671.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2^2991456 is an apocalyptic number.

2991456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2991456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4953312).

2991456 is an abundant number, since it is smaller than the sum of its proper divisors (6915168).

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

2991456 is a wasteful number, since it uses less digits than its factorization.

2991456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 82 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2991456 is about 1729.5826086082. The cubic root of 2991456 is about 144.0879092851.

It can be divided in two parts, 299145 and 6, that added together give a triangular number (299151 = T₇₇₃).

The spelling of 2991456 in words is "two million, nine hundred ninety-one thousand, four hundred fifty-six".