3621990 has 32 divisors (see below), whose sum is σ = 8759520. Its totient is φ = 958464.

The previous prime is 3621983. The next prime is 3622001. The reversal of 3621990 is 991263.

3621990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4326 + ... + 5094.

It is an arithmetic number, because the mean of its divisors is an integer number (273735).

Almost surely, 2^3621990 is an apocalyptic number.

3621990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3621990 is an abundant number, since it is smaller than the sum of its proper divisors (5137530).

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

3621990 is a wasteful number, since it uses less digits than its factorization.

3621990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 3621990 is about 1903.1526475824. The cubic root of 3621990 is about 153.5733114709.

The spelling of 3621990 in words is "three million, six hundred twenty-one thousand, nine hundred ninety".