3655140 has 24 divisors (see below), whose sum is σ = 10234560. Its totient is φ = 974688.

The previous prime is 3655139. The next prime is 3655159. The reversal of 3655140 is 415563.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3655140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30400 + ... + 30519.

It is an arithmetic number, because the mean of its divisors is an integer number (426440).

Almost surely, 2^3655140 is an apocalyptic number.

3655140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3655140 is an abundant number, since it is smaller than the sum of its proper divisors (6579420).

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

3655140 is a wasteful number, since it uses less digits than its factorization.

3655140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60931 (or 60929 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 3655140 is about 1911.8420436846. The cubic root of 3655140 is about 154.0404121749.

The spelling of 3655140 in words is "three million, six hundred fifty-five thousand, one hundred forty".