3997738 has 8 divisors (see below), whose sum is σ = 6033888. Its totient is φ = 1986444.

The previous prime is 3997723. The next prime is 3997751. The reversal of 3997738 is 8377993.

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5806 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (754236).

Almost surely, 2^3997738 is an apocalyptic number.

3997738 is a deficient number, since it is larger than the sum of its proper divisors (2036150).

3997738 is a wasteful number, since it uses less digits than its factorization.

3997738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12428.

The product of its digits is 285768, while the sum is 46.

The square root of 3997738 is about 1999.4344200298. The cubic root of 3997738 is about 158.7101770448.

The spelling of 3997738 in words is "three million, nine hundred ninety-seven thousand, seven hundred thirty-eight".