3661738 has 12 divisors (see below), whose sum is σ = 5743458. Its totient is φ = 1750760.

The previous prime is 3661733. The next prime is 3661739. The reversal of 3661738 is 8371663.

It can be written as a sum of positive squares in only one way, i.e., 3470769 + 190969 = 1863^2 + 437^2 .

It is not an unprimeable number, because it can be changed into a prime (3661733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673 + ... + 2788.

Almost surely, 2^3661738 is an apocalyptic number.

3661738 is a deficient number, since it is larger than the sum of its proper divisors (2081720).

3661738 is a wasteful number, since it uses less digits than its factorization.

3661738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509 (or 3486 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 3661738 is about 1913.5668266355. The cubic root of 3661738 is about 154.1330440759.

The spelling of 3661738 in words is "three million, six hundred sixty-one thousand, seven hundred thirty-eight".