2149440 has 56 divisors (see below), whose sum is σ = 6827520. Its totient is φ = 572928.

The previous prime is 2149421. The next prime is 2149453. The reversal of 2149440 is 449412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2149440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (121920).

2^2149440 is an apocalyptic number.

2149440 is a gapful number since it is divisible by the number (20) 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 2149440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3413760).

2149440 is an abundant number, since it is smaller than the sum of its proper divisors (4678080).

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

2149440 is a wasteful number, since it uses less digits than its factorization.

2149440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259 (or 2249 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2149440 is about 1466.0968590103. The cubic root of 2149440 is about 129.0550813391.

The spelling of 2149440 in words is "two million, one hundred forty-nine thousand, four hundred forty".