3621540 has 48 divisors (see below), whose sum is σ = 10922688. Its totient is φ = 891264.

The previous prime is 3621529. The next prime is 3621559. The reversal of 3621540 is 451263.

It is a happy 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, 1542 + ... + 3101.

It is an arithmetic number, because the mean of its divisors is an integer number (227556).

Almost surely, 2^3621540 is an apocalyptic number.

3621540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3621540 is an abundant number, since it is smaller than the sum of its proper divisors (7301148).

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

3621540 is a wasteful number, since it uses less digits than its factorization.

3621540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668 (or 4666 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3621540 is about 1903.0344190266. The cubic root of 3621540 is about 153.5669511687.

The spelling of 3621540 in words is "three million, six hundred twenty-one thousand, five hundred forty".