3989240 has 64 divisors (see below), whose sum is σ = 9828000. Its totient is φ = 1451520.

The previous prime is 3989233. The next prime is 3989243. The reversal of 3989240 is 429893.

3989240 = T₂₄₁ + T₂₄₂ + ... + T₃₃₅.

It is a self number, because there is not a number n which added to its sum of digits gives 3989240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989243) 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, 21950 + ... + 22130.

Almost surely, 2^3989240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4914000).

3989240 is an abundant number, since it is smaller than the sum of its proper divisors (5838760).

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

3989240 is a wasteful number, since it uses less digits than its factorization.

3989240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3989240 is about 1997.3081885378. The cubic root of 3989240 is about 158.5976404159.

The spelling of 3989240 in words is "three million, nine hundred eighty-nine thousand, two hundred forty".