3219640785 has 16 divisors (see below), whose sum is σ = 5723806080. Its totient is φ = 1717141680.

The previous prime is 3219640783. The next prime is 3219640789. The reversal of 3219640785 is 5870469123.

3219640785 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3219640785 - 2¹ = 3219640783 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

3219640785 is strictly pandigital in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 3219640785.

It is not an unprimeable number, because it can be changed into a prime (3219640783) 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, 11924461 + ... + 11924730.

It is an arithmetic number, because the mean of its divisors is an integer number (357737880).

It is a 2-persistent number, because it is pandigital, and so is 2⋅3219640785 = 6439281570, but 3⋅3219640785 = 9658922355 is not.

Almost surely, 2^3219640785 is an apocalyptic number.

It is an amenable number.

3219640785 is a deficient number, since it is larger than the sum of its proper divisors (2504165295).

3219640785 is a wasteful number, since it uses less digits than its factorization.

3219640785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23849205 (or 23849199 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 3219640785 is about 56741.8785818728. The cubic root of 3219640785 is about 1476.6213384767.

The spelling of 3219640785 in words is "three billion, two hundred nineteen million, six hundred forty thousand, seven hundred eighty-five".