3988715 has 4 divisors (see below), whose sum is σ = 4786464. Its totient is φ = 3190968.

The previous prime is 3988703. The next prime is 3988717. The reversal of 3988715 is 5178893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3988715 - 2¹⁸ = 3726571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3988717) 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, 398867 + ... + 398876.

It is an arithmetic number, because the mean of its divisors is an integer number (1196616).

Almost surely, 2^3988715 is an apocalyptic number.

3988715 is a deficient number, since it is larger than the sum of its proper divisors (797749).

3988715 is an equidigital number, since it uses as much as digits as its factorization.

3988715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797748.

The product of its digits is 60480, while the sum is 41.

The square root of 3988715 is about 1997.1767573252. The cubic root of 3988715 is about 158.5906827486.

The spelling of 3988715 in words is "three million, nine hundred eighty-eight thousand, seven hundred fifteen".