3656870443 has 4 divisors (see below), whose sum is σ = 3662955688. Its totient is φ = 3650785200.

The previous prime is 3656870423. The next prime is 3656870447. The reversal of 3656870443 is 3440786563.

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

It is a cyclic number.

It is not a de Polignac number, because 3656870443 - 2⁵ = 3656870411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3656870393 and 3656870402.

It is not an unprimeable number, because it can be changed into a prime (3656870447) 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, 3041721 + ... + 3042922.

It is an arithmetic number, because the mean of its divisors is an integer number (915738922).

Almost surely, 2^3656870443 is an apocalyptic number.

3656870443 is a deficient number, since it is larger than the sum of its proper divisors (6085245).

3656870443 is an equidigital number, since it uses as much as digits as its factorization.

3656870443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085244.

The product of its (nonzero) digits is 1451520, while the sum is 46.

The square root of 3656870443 is about 60472.0633267958. The cubic root of 3656870443 is about 1540.6471731770.

The spelling of 3656870443 in words is "three billion, six hundred fifty-six million, eight hundred seventy thousand, four hundred forty-three".