4018240 has 56 divisors (see below), whose sum is σ = 9921240. Its totient is φ = 1548288.

The previous prime is 4018207. The next prime is 4018243. The reversal of 4018240 is 428104.

It can be written as a sum of positive squares in 4 ways, for example, as 50176 + 3968064 = 224^2 + 1992^2 .

It is a super-2 number, since 2×4018240² = 32292505395200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018243) 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, 9064 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (177165).

Almost surely, 2^4018240 is an apocalyptic number.

4018240 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 4018240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4960620).

4018240 is an abundant number, since it is smaller than the sum of its proper divisors (5903000).

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

4018240 is a wasteful number, since it uses less digits than its factorization.

4018240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 4018240 is about 2004.5548134187. The cubic root of 4018240 is about 158.9810243299.

The spelling of 4018240 in words is "four million, eighteen thousand, two hundred forty".