3661040 has 20 divisors (see below), whose sum is σ = 8512104. Its totient is φ = 1464384.

The previous prime is 3661019. The next prime is 3661043. The reversal of 3661040 is 401663.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22802 + ... + 22961.

Almost surely, 2^3661040 is an apocalyptic number.

It is an amenable number.

3661040 is an abundant number, since it is smaller than the sum of its proper divisors (4851064).

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

3661040 is a wasteful number, since it uses less digits than its factorization.

3661040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45776 (or 45770 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3661040 is about 1913.3844360191. The cubic root of 3661040 is about 154.1232498469.

The spelling of 3661040 in words is "three million, six hundred sixty-one thousand, forty".