3621320 has 16 divisors (see below), whose sum is σ = 8148060. Its totient is φ = 1448512.

The previous prime is 3621313. The next prime is 3621329. The reversal of 3621320 is 231263.

3621320 = T₂₆₀ + T₂₆₁ + ... + T₃₃₉.

It can be written as a sum of positive squares in 2 ways, for example, as 3034564 + 586756 = 1742^2 + 766^2 .

It is a super-2 number, since 2×3621320² = 26227917084800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3621329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45227 + ... + 45306.

Almost surely, 2^3621320 is an apocalyptic number.

It is an amenable number.

3621320 is an abundant number, since it is smaller than the sum of its proper divisors (4526740).

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

3621320 is a wasteful number, since it uses less digits than its factorization.

3621320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90544 (or 90540 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3621320 is about 1902.9766157260. The cubic root of 3621320 is about 153.5638414959.

Adding to 3621320 its reverse (231263), we get a palindrome (3852583).

The spelling of 3621320 in words is "three million, six hundred twenty-one thousand, three hundred twenty".