3988947 has 8 divisors (see below), whose sum is σ = 5386240. Its totient is φ = 2625480.

The previous prime is 3988909. The next prime is 3988961. The reversal of 3988947 is 7498893.

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

It is not a de Polignac number, because 3988947 - 2¹⁵ = 3956179 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 3988896 and 3988905.

It is not an unprimeable number, because it can be changed into a prime (3988147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8179 + ... + 8652.

It is an arithmetic number, because the mean of its divisors is an integer number (673280).

Almost surely, 2^3988947 is an apocalyptic number.

3988947 is a deficient number, since it is larger than the sum of its proper divisors (1397293).

3988947 is a wasteful number, since it uses less digits than its factorization.

3988947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16913.

The product of its digits is 435456, while the sum is 48.

The square root of 3988947 is about 1997.2348384704. The cubic root of 3988947 is about 158.5937574502.

The spelling of 3988947 in words is "three million, nine hundred eighty-eight thousand, nine hundred forty-seven".