4030440 has 32 divisors (see below), whose sum is σ = 12091680. Its totient is φ = 1074752.

The previous prime is 4030421. The next prime is 4030441. The reversal of 4030440 is 440304.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (4030441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16674 + ... + 16913.

It is an arithmetic number, because the mean of its divisors is an integer number (377865).

Almost surely, 2^4030440 is an apocalyptic number.

4030440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4030440 is an abundant number, since it is smaller than the sum of its proper divisors (8061240).

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

4030440 is a wasteful number, since it uses less digits than its factorization.

4030440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33601 (or 33597 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 4030440 is about 2007.5955768033. The cubic root of 4030440 is about 159.1417587855.

Adding to 4030440 its reverse (440304), we get a palindrome (4470744).

The spelling of 4030440 in words is "four million, thirty thousand, four hundred forty".