3918387 has 8 divisors (see below), whose sum is σ = 5699520. Its totient is φ = 2374760.

The previous prime is 3918379. The next prime is 3918391. The reversal of 3918387 is 7838193.

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

It is a cyclic number.

It is not a de Polignac number, because 3918387 - 2³ = 3918379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3918377) 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 7 ways as a sum of consecutive naturals, for example, 59337 + ... + 59402.

It is an arithmetic number, because the mean of its divisors is an integer number (712440).

Almost surely, 2^3918387 is an apocalyptic number.

3918387 is a deficient number, since it is larger than the sum of its proper divisors (1781133).

3918387 is a wasteful number, since it uses less digits than its factorization.

3918387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118753.

The product of its digits is 36288, while the sum is 39.

The square root of 3918387 is about 1979.4916013967. The cubic root of 3918387 is about 157.6530736543.

It can be divided in two parts, 391 and 8387, that added together give a palindrome (8778).

The spelling of 3918387 in words is "three million, nine hundred eighteen thousand, three hundred eighty-seven".