3987786 has 64 divisors (see below), whose sum is σ = 9455616. Its totient is φ = 1108800.

The previous prime is 3987769. The next prime is 3987791. The reversal of 3987786 is 6877893.

It is a d-powerful number, because it can be written as 3¹² + 9⁶ + 8³ + 7⁴ + 7⁷ + 8⁷ + 6⁴ .

Its product of digits (508032) is a multiple of the sum of its prime divisors (147).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56131 + ... + 56201.

It is an arithmetic number, because the mean of its divisors is an integer number (147744).

Almost surely, 2^3987786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3987786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4727808).

3987786 is an abundant number, since it is smaller than the sum of its proper divisors (5467830).

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

3987786 is a wasteful number, since it uses less digits than its factorization.

3987786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147.

The product of its digits is 508032, while the sum is 48.

The square root of 3987786 is about 1996.9441654688. The cubic root of 3987786 is about 158.5783694946.

It can be divided in two parts, 3 and 987786, that added together give a palindrome (987789).

The spelling of 3987786 in words is "three million, nine hundred eighty-seven thousand, seven hundred eighty-six".