3621072 has 80 divisors (see below), whose sum is σ = 11527040. Its totient is φ = 953856.

The previous prime is 3621067. The next prime is 3621083. The reversal of 3621072 is 2701263.

It is a happy number.

It is a super-2 number, since 2×3621072² = 26224324858368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3954 + ... + 4782.

It is an arithmetic number, because the mean of its divisors is an integer number (144088).

Almost surely, 2^3621072 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 3621072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5763520).

3621072 is an abundant number, since it is smaller than the sum of its proper divisors (7905968).

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

3621072 is a wasteful number, since it uses less digits than its factorization.

3621072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 3621072 is about 1902.9114535364. The cubic root of 3621072 is about 153.5603358956.

The spelling of 3621072 in words is "three million, six hundred twenty-one thousand, seventy-two".