3990735 has 64 divisors (see below), whose sum is σ = 8386560. Its totient is φ = 1762560.

The previous prime is 3990731. The next prime is 3990737. The reversal of 3990735 is 5370993.

It is not a de Polignac number, because 3990735 - 2² = 3990731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3990735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38694 + ... + 38796.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

Almost surely, 2^3990735 is an apocalyptic number.

3990735 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3990735 is an abundant number, since it is smaller than the sum of its proper divisors (4395825).

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

3990735 is a wasteful number, since it uses less digits than its factorization.

3990735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 3990735 is about 1997.6824071909. The cubic root of 3990735 is about 158.6174498583.

The spelling of 3990735 in words is "three million, nine hundred ninety thousand, seven hundred thirty-five".