3996520 has 64 divisors (see below), whose sum is σ = 10160640. Its totient is φ = 1401600.

The previous prime is 3996511. The next prime is 3996521. The reversal of 3996520 is 256993.

It is a happy number.

It is a super-2 number, since 2×3996520² = 31944344220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3996521) 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, 13494 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

Almost surely, 2^3996520 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 3996520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5080320).

3996520 is an abundant number, since it is smaller than the sum of its proper divisors (6164120).

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

3996520 is a wasteful number, since it uses less digits than its factorization.

3996520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 3996520 is about 1999.1298106926. The cubic root of 3996520 is about 158.6940572098.

The spelling of 3996520 in words is "three million, nine hundred ninety-six thousand, five hundred twenty".