3643887 has 16 divisors (see below), whose sum is σ = 5267808. Its totient is φ = 2227200.

The previous prime is 3643883. The next prime is 3643891. The reversal of 3643887 is 7883463.

It is an interprime number because it is at equal distance from previous prime (3643883) and next prime (3643891).

It is not a de Polignac number, because 3643887 - 2² = 3643883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8887 + ... + 9287.

It is an arithmetic number, because the mean of its divisors is an integer number (329238).

Almost surely, 2^3643887 is an apocalyptic number.

3643887 is a deficient number, since it is larger than the sum of its proper divisors (1623921).

3643887 is a wasteful number, since it uses less digits than its factorization.

3643887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650.

The product of its digits is 96768, while the sum is 39.

The square root of 3643887 is about 1908.8968018204. The cubic root of 3643887 is about 153.8821693822.

The spelling of 3643887 in words is "three million, six hundred forty-three thousand, eight hundred eighty-seven".