3686988 has 48 divisors (see below), whose sum is σ = 9201920. Its totient is φ = 1145664.

The previous prime is 3686987. The next prime is 3686989. The reversal of 3686988 is 8896863.

It is an interprime number because it is at equal distance from previous prime (3686987) and next prime (3686989).

It is not an unprimeable number, because it can be changed into a prime (3686983) 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, 23406 + ... + 23562.

Almost surely, 2^3686988 is an apocalyptic number.

3686988 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3686988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4600960).

3686988 is an abundant number, since it is smaller than the sum of its proper divisors (5514932).

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

3686988 is a wasteful number, since it uses less digits than its factorization.

3686988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 284 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 3686988 is about 1920.1531188944. The cubic root of 3686988 is about 154.4865144648.

The spelling of 3686988 in words is "three million, six hundred eighty-six thousand, nine hundred eighty-eight".