3887646 has 32 divisors (see below), whose sum is σ = 8959488. Its totient is φ = 1101600.

The previous prime is 3887641. The next prime is 3887657. The reversal of 3887646 is 6467883.

It is a super-2 number, since 2×3887646² = 30227582842632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3887598 and 3887607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887641) 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, 6036 + ... + 6648.

It is an arithmetic number, because the mean of its divisors is an integer number (279984).

Almost surely, 2^3887646 is an apocalyptic number.

3887646 is an abundant number, since it is smaller than the sum of its proper divisors (5071842).

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

3887646 is a wasteful number, since it uses less digits than its factorization.

3887646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its digits is 193536, while the sum is 42.

The square root of 3887646 is about 1971.7114393339. The cubic root of 3887646 is about 157.2397111700.

The spelling of 3887646 in words is "three million, eight hundred eighty-seven thousand, six hundred forty-six".