2091408 has 80 divisors (see below), whose sum is σ = 6267456. Its totient is φ = 593920.

The previous prime is 2091389. The next prime is 2091409. The reversal of 2091408 is 8041902.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2091409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8860 + ... + 9092.

2^2091408 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 2091408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3133728).

2091408 is an abundant number, since it is smaller than the sum of its proper divisors (4176048).

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

2091408 is a wasteful number, since it uses less digits than its factorization.

2091408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2091408 is about 1446.1701144748. The cubic root of 2091408 is about 127.8830311650.

The spelling of 2091408 in words is "two million, ninety-one thousand, four hundred eight".