3978715 has 8 divisors (see below), whose sum is σ = 5141808. Its totient is φ = 2938080.

The previous prime is 3978707. The next prime is 3978727. The reversal of 3978715 is 5178793.

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

It is not a de Polignac number, because 3978715 - 2³ = 3978707 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30541 + ... + 30670.

It is an arithmetic number, because the mean of its divisors is an integer number (642726).

Almost surely, 2^3978715 is an apocalyptic number.

3978715 is a deficient number, since it is larger than the sum of its proper divisors (1163093).

3978715 is a wasteful number, since it uses less digits than its factorization.

3978715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61229.

The product of its digits is 52920, while the sum is 40.

The square root of 3978715 is about 1994.6716521774. The cubic root of 3978715 is about 158.4580390272.

The spelling of 3978715 in words is "three million, nine hundred seventy-eight thousand, seven hundred fifteen".