3661388 has 12 divisors (see below), whose sum is σ = 6495720. Its totient is φ = 1805472.

The previous prime is 3661381. The next prime is 3661391. The reversal of 3661388 is 8831663.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3661381) 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, 5978 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (541310).

Almost surely, 2^3661388 is an apocalyptic number.

It is an amenable number.

3661388 is a deficient number, since it is larger than the sum of its proper divisors (2834332).

3661388 is a wasteful number, since it uses less digits than its factorization.

3661388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12616 (or 12614 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 3661388 is about 1913.4753721958. The cubic root of 3661388 is about 154.1281330851.

The spelling of 3661388 in words is "three million, six hundred sixty-one thousand, three hundred eighty-eight".