2423440 has 20 divisors (see below), whose sum is σ = 5634684. Its totient is φ = 969344.

The previous prime is 2423429. The next prime is 2423453. The reversal of 2423440 is 443242.

It can be written as a sum of positive squares in 2 ways, for example, as 944784 + 1478656 = 972^2 + 1216^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2423440² = 11746122867200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15067 + ... + 15226.

2^2423440 is an apocalyptic number.

2423440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2423440 is an abundant number, since it is smaller than the sum of its proper divisors (3211244).

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

2423440 is a wasteful number, since it uses less digits than its factorization.

2423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30306 (or 30300 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 2423440 is about 1556.7401838457. The cubic root of 2423440 is about 134.3210538820.

Adding to 2423440 its reverse (443242), we get a palindrome (2866682).

The spelling of 2423440 in words is "two million, four hundred twenty-three thousand, four hundred forty".