387636 has 12 divisors (see below), whose sum is σ = 904512. Its totient is φ = 129208.

The previous prime is 387631. The next prime is 387641. The reversal of 387636 is 636783.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (387631) and next prime (387641).

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 387597 and 387606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16140 + ... + 16163.

It is an arithmetic number, because the mean of its divisors is an integer number (75376).

2³⁸⁷⁶³⁶ is an apocalyptic number.

It is an amenable number.

387636 is an abundant number, since it is smaller than the sum of its proper divisors (516876).

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

387636 is a wasteful number, since it uses less digits than its factorization.

387636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32310 (or 32308 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 387636 is about 622.6042081451. The cubic root of 387636 is about 72.9135148932.

The spelling of 387636 in words is "three hundred eighty-seven thousand, six hundred thirty-six".