3656990 has 8 divisors (see below), whose sum is σ = 6582600. Its totient is φ = 1462792.

The previous prime is 3656981. The next prime is 3656993. The reversal of 3656990 is 996563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182840 + ... + 182859.

It is an arithmetic number, because the mean of its divisors is an integer number (822825).

Almost surely, 2^3656990 is an apocalyptic number.

3656990 is a deficient number, since it is larger than the sum of its proper divisors (2925610).

3656990 is a wasteful number, since it uses less digits than its factorization.

3656990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365706.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 3656990 is about 1912.3258090608. The cubic root of 3656990 is about 154.0663962866.

The spelling of 3656990 in words is "three million, six hundred fifty-six thousand, nine hundred ninety".