3655920 has 40 divisors (see below), whose sum is σ = 11334096. Its totient is φ = 974848.

The previous prime is 3655907. The next prime is 3655921. The reversal of 3655920 is 295563.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7377 + ... + 7856.

Almost surely, 2^3655920 is an apocalyptic number.

3655920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3655920 is an abundant number, since it is smaller than the sum of its proper divisors (7678176).

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

3655920 is a wasteful number, since it uses less digits than its factorization.

3655920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15249 (or 15243 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 3655920 is about 1912.0460245507. The cubic root of 3655920 is about 154.0513687070.

The spelling of 3655920 in words is "three million, six hundred fifty-five thousand, nine hundred twenty".