4020240 has 80 divisors (see below), whose sum is σ = 14249088. Its totient is φ = 918528.

The previous prime is 4020227. The next prime is 4020257. The reversal of 4020240 is 420204.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484 + ... + 2876.

Almost surely, 2^4020240 is an apocalyptic number.

4020240 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 4020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7124544).

4020240 is an abundant number, since it is smaller than the sum of its proper divisors (10228848).

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

4020240 is a wasteful number, since it uses less digits than its factorization.

4020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 4020240 is about 2005.0536152432. The cubic root of 4020240 is about 159.0073965152.

Adding to 4020240 its reverse (420204), we get a palindrome (4440444).

The spelling of 4020240 in words is "four million, twenty thousand, two hundred forty".