3978586 has 8 divisors (see below), whose sum is σ = 6227424. Its totient is φ = 1902780.

The previous prime is 3978553. The next prime is 3978587. The reversal of 3978586 is 6858793.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 86491 = 3978586 / (3 + 9 + 7 + 8 + 5 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (3978587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43200 + ... + 43291.

It is an arithmetic number, because the mean of its divisors is an integer number (778428).

Almost surely, 2^3978586 is an apocalyptic number.

3978586 is a deficient number, since it is larger than the sum of its proper divisors (2248838).

3978586 is a wasteful number, since it uses less digits than its factorization.

3978586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86516.

The product of its digits is 362880, while the sum is 46.

The square root of 3978586 is about 1994.6393157661. The cubic root of 3978586 is about 158.4563264719.

The spelling of 3978586 in words is "three million, nine hundred seventy-eight thousand, five hundred eighty-six".