3661938 has 24 divisors (see below), whose sum is σ = 9067968. Its totient is φ = 1046232.

The previous prime is 3661913. The next prime is 3661943. The reversal of 3661938 is 8391663.

It is a happy number.

3661938 is a `hidden beast` number, since 3 + 6 + 619 + 38 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14406 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (377832).

Almost surely, 2^3661938 is an apocalyptic number.

3661938 is an abundant number, since it is smaller than the sum of its proper divisors (5406030).

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

3661938 is a wasteful number, since it uses less digits than its factorization.

3661938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29078 (or 29075 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3661938 is about 1913.6190843530. The cubic root of 3661938 is about 154.1358502158.

It can be divided in two parts, 366 and 1938, that added together give a square (2304 = 48²).

The spelling of 3661938 in words is "three million, six hundred sixty-one thousand, nine hundred thirty-eight".