3978612 has 96 divisors (see below), whose sum is σ = 11975040. Its totient is φ = 1128960.

The previous prime is 3978593. The next prime is 3978641. The reversal of 3978612 is 2168793.

3978612 is a `hidden beast` number, since 39 + 7 + 8 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 20098 + ... + 20294.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

Almost surely, 2^3978612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3978612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5987520).

3978612 is an abundant number, since it is smaller than the sum of its proper divisors (7996428).

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

3978612 is a wasteful number, since it uses less digits than its factorization.

3978612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 230 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3978612 is about 1994.6458332245. The cubic root of 3978612 is about 158.4566716410.

It can be divided in two parts, 397 and 8612, that added together give a palindrome (9009).

The spelling of 3978612 in words is "three million, nine hundred seventy-eight thousand, six hundred twelve".