4026440 has 32 divisors (see below), whose sum is σ = 9884160. Its totient is φ = 1464000.

The previous prime is 4026437. The next prime is 4026469. The reversal of 4026440 is 446204.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4136 + ... + 5015.

It is an arithmetic number, because the mean of its divisors is an integer number (308880).

Almost surely, 2^4026440 is an apocalyptic number.

4026440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4026440 is an abundant number, since it is smaller than the sum of its proper divisors (5857720).

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

4026440 is a wasteful number, since it uses less digits than its factorization.

4026440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173 (or 9169 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4026440 is about 2006.5991129271. The cubic root of 4026440 is about 159.0890947474.

It can be divided in two parts, 40264 and 40, that added together give a palindrome (40304).

The spelling of 4026440 in words is "four million, twenty-six thousand, four hundred forty".