3990286 has 4 divisors (see below), whose sum is σ = 5985432. Its totient is φ = 1995142.

The previous prime is 3990281. The next prime is 3990307. The reversal of 3990286 is 6820993.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997570 + ... + 997573.

It is an arithmetic number, because the mean of its divisors is an integer number (1496358).

Almost surely, 2^3990286 is an apocalyptic number.

3990286 is a deficient number, since it is larger than the sum of its proper divisors (1995146).

3990286 is a wasteful number, since it uses less digits than its factorization.

3990286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995145.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 3990286 is about 1997.5700238039. The cubic root of 3990286 is about 158.6115009203.

The spelling of 3990286 in words is "three million, nine hundred ninety thousand, two hundred eighty-six".