3681020 has 24 divisors (see below), whose sum is σ = 8834784. Its totient is φ = 1262016.

The previous prime is 3681017. The next prime is 3681023. The reversal of 3681020 is 201863.

3681020 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3681017) and next prime (3681023).

It is a Harshad number since it is a multiple of its sum of digits (20).

3681020 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 3680983 and 3681001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13007 + ... + 13286.

It is an arithmetic number, because the mean of its divisors is an integer number (368116).

Almost surely, 2^3681020 is an apocalyptic number.

It is an amenable number.

3681020 is an abundant number, since it is smaller than the sum of its proper divisors (5153764).

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

3681020 is a wasteful number, since it uses less digits than its factorization.

3681020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26309 (or 26307 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3681020 is about 1918.5984467835. The cubic root of 3681020 is about 154.4031154570.

Adding to 3681020 its reverse (201863), we get a palindrome (3882883).

The spelling of 3681020 in words is "three million, six hundred eighty-one thousand, twenty".