2291408 has 40 divisors (see below), whose sum is σ = 5208000. Its totient is φ = 956160.

The previous prime is 2291389. The next prime is 2291417. The reversal of 2291408 is 8041922.

2291408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4343 + ... + 4841.

It is an arithmetic number, because the mean of its divisors is an integer number (130200).

2^2291408 is an apocalyptic number.

2291408 is a gapful number since it is divisible by the number (28) 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 2291408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2604000).

2291408 is an abundant number, since it is smaller than the sum of its proper divisors (2916592).

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

2291408 is a wasteful number, since it uses less digits than its factorization.

2291408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2291408 is about 1513.7397398496. The cubic root of 2291408 is about 131.8360376201.

The spelling of 2291408 in words is "two million, two hundred ninety-one thousand, four hundred eight".