3912138 has 80 divisors (see below), whose sum is σ = 9757440. Its totient is φ = 1166400.

The previous prime is 3912131. The next prime is 3912199. The reversal of 3912138 is 8312193.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3912131) 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 39 ways as a sum of consecutive naturals, for example, 95398 + ... + 95438.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

Almost surely, 2^3912138 is an apocalyptic number.

3912138 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3912138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4878720).

3912138 is an abundant number, since it is smaller than the sum of its proper divisors (5845302).

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

3912138 is a wasteful number, since it uses less digits than its factorization.

3912138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 96 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 3912138 is about 1977.9125359833. The cubic root of 3912138 is about 157.5692212735.

The spelling of 3912138 in words is "three million, nine hundred twelve thousand, one hundred thirty-eight".