3918887 has 4 divisors (see below), whose sum is σ = 4478736. Its totient is φ = 3359040.

The previous prime is 3918881. The next prime is 3918899. The reversal of 3918887 is 7888193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7888193 = 563 ⋅14011.

It is a cyclic number.

It is not a de Polignac number, because 3918887 - 2¹⁰ = 3917863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918881) 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 3 ways as a sum of consecutive naturals, for example, 279914 + ... + 279927.

It is an arithmetic number, because the mean of its divisors is an integer number (1119684).

Almost surely, 2^3918887 is an apocalyptic number.

3918887 is a deficient number, since it is larger than the sum of its proper divisors (559849).

3918887 is an equidigital number, since it uses as much as digits as its factorization.

3918887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559848.

The product of its digits is 96768, while the sum is 44.

The square root of 3918887 is about 1979.6178924227. The cubic root of 3918887 is about 157.6597790651.

The spelling of 3918887 in words is "three million, nine hundred eighteen thousand, eight hundred eighty-seven".