3990140 has 48 divisors (see below), whose sum is σ = 10450944. Its totient is φ = 1243200.

The previous prime is 3990127. The next prime is 3990157. The reversal of 3990140 is 410993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245 + ... + 2835.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

Almost surely, 2^3990140 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 3990140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5225472).

3990140 is an abundant number, since it is smaller than the sum of its proper divisors (6460804).

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

3990140 is a wasteful number, since it uses less digits than its factorization.

3990140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618 (or 2616 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 3990140 is about 1997.5334790686. The cubic root of 3990140 is about 158.6095664255.

The spelling of 3990140 in words is "three million, nine hundred ninety thousand, one hundred forty".