4128240 has 80 divisors (see below), whose sum is σ = 12999168. Its totient is φ = 1083648.

The previous prime is 4128233. The next prime is 4128251. The reversal of 4128240 is 428214.

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

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, 24637 + ... + 24803.

Almost surely, 2^4128240 is an apocalyptic number.

4128240 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 4128240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6499584).

4128240 is an abundant number, since it is smaller than the sum of its proper divisors (8870928).

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

4128240 is a wasteful number, since it uses less digits than its factorization.

4128240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 4128240 is about 2031.8070774559. The cubic root of 4128240 is about 160.4186950513.

The spelling of 4128240 in words is "four million, one hundred twenty-eight thousand, two hundred forty".