3728986 has 8 divisors (see below), whose sum is σ = 5670324. Its totient is φ = 1838880.

The previous prime is 3728983. The next prime is 3728987. The reversal of 3728986 is 6898273.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 225 = 1931^2 + 15^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3728983) 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, 12625 + ... + 12916.

Almost surely, 2^3728986 is an apocalyptic number.

3728986 is a deficient number, since it is larger than the sum of its proper divisors (1941338).

3728986 is a wasteful number, since it uses less digits than its factorization.

3728986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25616.

The product of its digits is 145152, while the sum is 43.

The square root of 3728986 is about 1931.0582590901. The cubic root of 3728986 is about 155.0708798267.

The spelling of 3728986 in words is "three million, seven hundred twenty-eight thousand, nine hundred eighty-six".