3621672 has 80 divisors (see below), whose sum is σ = 10628640. Its totient is φ = 1154736.

The previous prime is 3621661. The next prime is 3621691. The reversal of 3621672 is 2761263.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (3024) is a multiple of the sum of its prime divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 157453 + ... + 157475.

It is an arithmetic number, because the mean of its divisors is an integer number (132858).

Almost surely, 2^3621672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3621672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5314320).

3621672 is an abundant number, since it is smaller than the sum of its proper divisors (7006968).

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

3621672 is an frugal number, since it uses more digits than its factorization.

3621672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 28 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 3621672 is about 1903.0691001643. The cubic root of 3621672 is about 153.5688169120.

The spelling of 3621672 in words is "three million, six hundred twenty-one thousand, six hundred seventy-two".