4312440 has 160 divisors (see below), whose sum is σ = 15942960. Its totient is φ = 1045440.

The previous prime is 4312433. The next prime is 4312447. The reversal of 4312440 is 442134.

It is an interprime number because it is at equal distance from previous prime (4312433) and next prime (4312447).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4312447) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 392035 + ... + 392045.

Almost surely, 2^4312440 is an apocalyptic number.

4312440 is a gapful number since it is divisible by the number (40) 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 4312440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7971480).

4312440 is an abundant number, since it is smaller than the sum of its proper divisors (11630520).

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

4312440 is a wasteful number, since it uses less digits than its factorization.

4312440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4312440 is about 2076.6415193769. The cubic root of 4312440 is about 162.7699969058.

Adding to 4312440 its reverse (442134), we get a palindrome (4754574).

The spelling of 4312440 in words is "four million, three hundred twelve thousand, four hundred forty".