4018320 has 60 divisors (see below), whose sum is σ = 13497276. Its totient is φ = 1071360.

The previous prime is 4018309. The next prime is 4018321. The reversal of 4018320 is 238104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1354896 + 2663424 = 1164^2 + 1632^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×4018320² = 32293791244800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 4018293 and 4018302.

It is not an unprimeable number, because it can be changed into a prime (4018321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2071 + ... + 3510.

Almost surely, 2^4018320 is an apocalyptic number.

4018320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4018320 is an abundant number, since it is smaller than the sum of its proper divisors (9478956).

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

4018320 is a wasteful number, since it uses less digits than its factorization.

4018320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600 (or 5591 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4018320 is about 2004.5747678747. The cubic root of 4018320 is about 158.9820793853.

The spelling of 4018320 in words is "four million, eighteen thousand, three hundred twenty".