4006240 has 96 divisors (see below), whose sum is σ = 11188800. Its totient is φ = 1354752.

The previous prime is 4006231. The next prime is 4006241. The reversal of 4006240 is 426004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54844 + ... + 54916.

It is an arithmetic number, because the mean of its divisors is an integer number (116550).

Almost surely, 2^4006240 is an apocalyptic number.

4006240 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 4006240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5594400).

4006240 is an abundant number, since it is smaller than the sum of its proper divisors (7182560).

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

4006240 is an equidigital number, since it uses as much as digits as its factorization.

4006240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4006240 is about 2001.5593920741. The cubic root of 4006240 is about 158.8226071654.

The spelling of 4006240 in words is "four million, six thousand, two hundred forty".