3978675 has 18 divisors (see below), whose sum is σ = 7126652. Its totient is φ = 2121840.

The previous prime is 3978673. The next prime is 3978683. The reversal of 3978675 is 5768793.

It is a happy number.

It is not a de Polignac number, because 3978675 - 2¹ = 3978673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a d-powerful number, because it can be written as 3⁹ + 9⁵ + 7⁴ + 8⁷ + 6⁸ + 7⁶ + 5⁵ .

It is a Duffinian number.

3978675 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3978675.

It is not an unprimeable number, because it can be changed into a prime (3978671) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8617 + ... + 9066.

Almost surely, 2^3978675 is an apocalyptic number.

3978675 is a deficient number, since it is larger than the sum of its proper divisors (3147977).

3978675 is a wasteful number, since it uses less digits than its factorization.

3978675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17699 (or 17691 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 3978675 is about 1994.6616254393. The cubic root of 3978675 is about 158.4575080062.

The spelling of 3978675 in words is "three million, nine hundred seventy-eight thousand, six hundred seventy-five".