3655940 has 24 divisors (see below), whose sum is σ = 7824600. Its totient is φ = 1434368.

The previous prime is 3655937. The next prime is 3655957. The reversal of 3655940 is 495563.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23104 + 3632836 = 152^2 + 1906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3655897 and 3655906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 2784.

It is an arithmetic number, because the mean of its divisors is an integer number (326025).

Almost surely, 2^3655940 is an apocalyptic number.

It is an amenable number.

3655940 is an abundant number, since it is smaller than the sum of its proper divisors (4168660).

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

3655940 is a wasteful number, since it uses less digits than its factorization.

3655940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 3655940 is about 1912.0512545431. The cubic root of 3655940 is about 154.0516496232.

The spelling of 3655940 in words is "three million, six hundred fifty-five thousand, nine hundred forty".