3644040 has 32 divisors (see below), whose sum is σ = 10932480. Its totient is φ = 971712.

The previous prime is 3644023. The next prime is 3644057. The reversal of 3644040 is 404463.

3644040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3644023) and next prime (3644057).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3643998 and 3644016.

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 7 ways as a sum of consecutive naturals, for example, 15064 + ... + 15303.

It is an arithmetic number, because the mean of its divisors is an integer number (341640).

Almost surely, 2^3644040 is an apocalyptic number.

3644040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3644040 is an abundant number, since it is smaller than the sum of its proper divisors (7288440).

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

3644040 is a wasteful number, since it uses less digits than its factorization.

3644040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30381 (or 30377 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 3644040 is about 1908.9368769030. The cubic root of 3644040 is about 153.8843230935.

The spelling of 3644040 in words is "three million, six hundred forty-four thousand, forty".