3656487 has 4 divisors (see below), whose sum is σ = 4875320. Its totient is φ = 2437656.

The previous prime is 3656483. The next prime is 3656491. The reversal of 3656487 is 7846563.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3656483) and next prime (3656491).

It is not a de Polignac number, because 3656487 - 2² = 3656483 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656483) 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, 609412 + ... + 609417.

It is an arithmetic number, because the mean of its divisors is an integer number (1218830).

Almost surely, 2^3656487 is an apocalyptic number.

3656487 is a deficient number, since it is larger than the sum of its proper divisors (1218833).

3656487 is a wasteful number, since it uses less digits than its factorization.

3656487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218832.

The product of its digits is 120960, while the sum is 39.

The square root of 3656487 is about 1912.1942892918. The cubic root of 3656487 is about 154.0593322849.

The spelling of 3656487 in words is "three million, six hundred fifty-six thousand, four hundred eighty-seven".