3655656 has 24 divisors (see below), whose sum is σ = 9900930. Its totient is φ = 1218528.

The previous prime is 3655651. The next prime is 3655661. The reversal of 3655656 is 6565563.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3655651) and next prime (3655661).

It can be written as a sum of positive squares in only one way, i.e., 2722500 + 933156 = 1650^2 + 966^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 3655656.

It is not an unprimeable number, because it can be changed into a prime (3655651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25315 + ... + 25458.

Almost surely, 2^3655656 is an apocalyptic number.

3655656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3655656 is an abundant number, since it is smaller than the sum of its proper divisors (6245274).

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

3655656 is a wasteful number, since it uses less digits than its factorization.

3655656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50785 (or 50778 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 3655656 is about 1911.9769873092. The cubic root of 3655656 is about 154.0476605168.

The spelling of 3655656 in words is "three million, six hundred fifty-five thousand, six hundred fifty-six".