3987810 has 48 divisors (see below), whose sum is σ = 10558080. Its totient is φ = 1044000.

The previous prime is 3987799. The next prime is 3987811. The reversal of 3987810 is 187893.

It is a super-2 number, since 2×3987810² = 31805257192200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3987811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4935 + ... + 5685.

It is an arithmetic number, because the mean of its divisors is an integer number (219960).

Almost surely, 2^3987810 is an apocalyptic number.

3987810 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3987810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5279040).

3987810 is an abundant number, since it is smaller than the sum of its proper divisors (6570270).

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

3987810 is a wasteful number, since it uses less digits than its factorization.

3987810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 3987810 is about 1996.9501746413. The cubic root of 3987810 is about 158.5786876221.

The spelling of 3987810 in words is "three million, nine hundred eighty-seven thousand, eight hundred ten".