3978924 has 12 divisors (see below), whose sum is σ = 9284184. Its totient is φ = 1326304.

The previous prime is 3978917. The next prime is 3978967. The reversal of 3978924 is 4298793.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 3 + 9³ + 7⁷ + 8⁷ + 9³ + 2¹³ + 4¹⁰ .

It is an unprimeable number.

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, 165777 + ... + 165800.

It is an arithmetic number, because the mean of its divisors is an integer number (773682).

Almost surely, 2^3978924 is an apocalyptic number.

It is an amenable number.

3978924 is an abundant number, since it is smaller than the sum of its proper divisors (5305260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3978924 is a wasteful number, since it uses less digits than its factorization.

3978924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331584 (or 331582 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 3978924 is about 1994.7240410643. The cubic root of 3978924 is about 158.4608135536.

The spelling of 3978924 in words is "three million, nine hundred seventy-eight thousand, nine hundred twenty-four".