3918138 has 24 divisors (see below), whose sum is σ = 9116352. Its totient is φ = 1119384.

The previous prime is 3918137. The next prime is 3918139. The reversal of 3918138 is 8318193.

It is an interprime number because it is at equal distance from previous prime (3918137) and next prime (3918139).

It is a junction number, because it is equal to n+sod(n) for n = 3918099 and 3918108.

It is not an unprimeable number, because it can be changed into a prime (3918137) 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 11 ways as a sum of consecutive naturals, for example, 6370 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (379848).

Almost surely, 2^3918138 is an apocalyptic number.

3918138 is an abundant number, since it is smaller than the sum of its proper divisors (5198214).

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

3918138 is a wasteful number, since it uses less digits than its factorization.

3918138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13346 (or 13339 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 3918138 is about 1979.4287054602. The cubic root of 3918138 is about 157.6497341469.

The spelling of 3918138 in words is "three million, nine hundred eighteen thousand, one hundred thirty-eight".