2239440 has 160 divisors (see below), whose sum is σ = 8380416. Its totient is φ = 483840.

The previous prime is 2239417. The next prime is 2239453. The reversal of 2239440 is 449322.

2239440 = T₃₀₁ + T₃₀₂ + ... + T₃₄₃.

It is a happy number.

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 2239440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52059 + ... + 52101.

2^2239440 is an apocalyptic number.

2239440 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 2239440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4190208).

2239440 is an abundant number, since it is smaller than the sum of its proper divisors (6140976).

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

2239440 is a wasteful number, since it uses less digits than its factorization.

2239440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2239440 is about 1496.4758601461. The cubic root of 2239440 is about 130.8317479444.

The spelling of 2239440 in words is "two million, two hundred thirty-nine thousand, four hundred forty".