3656628947 has 16 divisors (see below), whose sum is σ = 3775535712. Its totient is φ = 3539827200.

The previous prime is 3656628931. The next prime is 3656628959. The reversal of 3656628947 is 7498266563.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3656628947 - 2⁴ = 3656628931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3656628892 and 3656628901.

It is not an unprimeable number, because it can be changed into a prime (3656628967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1802948 + ... + 1804974.

It is an arithmetic number, because the mean of its divisors is an integer number (235970982).

Almost surely, 2^3656628947 is an apocalyptic number.

3656628947 is a deficient number, since it is larger than the sum of its proper divisors (118906765).

3656628947 is a wasteful number, since it uses less digits than its factorization.

3656628947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518.

The product of its digits is 13063680, while the sum is 56.

The square root of 3656628947 is about 60470.0665370892. The cubic root of 3656628947 is about 1540.6132581737.

The spelling of 3656628947 in words is "three billion, six hundred fifty-six million, six hundred twenty-eight thousand, nine hundred forty-seven".