3625640 has 16 divisors (see below), whose sum is σ = 8157780. Its totient is φ = 1450240.

The previous prime is 3625621. The next prime is 3625649. The reversal of 3625640 is 465263.

3625640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3556996 + 68644 = 1886^2 + 262^2 .

It is not an unprimeable number, because it can be changed into a prime (3625649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 45281 + ... + 45360.

Almost surely, 2^3625640 is an apocalyptic number.

It is an amenable number.

3625640 is an abundant number, since it is smaller than the sum of its proper divisors (4532140).

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

3625640 is a wasteful number, since it uses less digits than its factorization.

3625640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90652 (or 90648 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3625640 is about 1904.1113412823. Note that the first 3 decimals coincide. The cubic root of 3625640 is about 153.6248811329.

The spelling of 3625640 in words is "three million, six hundred twenty-five thousand, six hundred forty".