4026240 has 128 divisors (see below), whose sum is σ = 14320800. Its totient is φ = 1069056.

The previous prime is 4026227. The next prime is 4026257. The reversal of 4026240 is 426204.

4026240 is a `hidden beast` number, since 40 + 2 + 624 + 0 = 666.

4026240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

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, 17164 + ... + 17396.

Almost surely, 2^4026240 is an apocalyptic number.

4026240 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 4026240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7160400).

4026240 is an abundant number, since it is smaller than the sum of its proper divisors (10294560).

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

4026240 is a wasteful number, since it uses less digits than its factorization.

4026240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4026240 is about 2006.5492767435. The cubic root of 4026240 is about 159.0864606301.

The spelling of 4026240 in words is "four million, twenty-six thousand, two hundred forty".