3621900 has 36 divisors (see below), whose sum is σ = 10480232. Its totient is φ = 965760.

The previous prime is 3621889. The next prime is 3621907. The reversal of 3621900 is 91263.

It is a super-4 number, since 4×3621900⁴ (a number of 27 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3621907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5737 + ... + 6336.

Almost surely, 2^3621900 is an apocalyptic number.

3621900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3621900 is an abundant number, since it is smaller than the sum of its proper divisors (6858332).

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

3621900 is a wasteful number, since it uses less digits than its factorization.

3621900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12090 (or 12083 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 3621900 is about 1903.1290024588. The cubic root of 3621900 is about 153.5720394526.

The spelling of 3621900 in words is "three million, six hundred twenty-one thousand, nine hundred".