3872280785 has 4 divisors (see below), whose sum is σ = 4646736948. Its totient is φ = 3097824624.

The previous prime is 3872280779. The next prime is 3872280799. The reversal of 3872280785 is 5870822783.

3872280785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3091804816 + 780475969 = 55604^2 + 27937^2 .

It is a cyclic number.

It is not a de Polignac number, because 3872280785 - 2¹⁴ = 3872264401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387228074 + ... + 387228083.

It is an arithmetic number, because the mean of its divisors is an integer number (1161684237).

Almost surely, 2^3872280785 is an apocalyptic number.

It is an amenable number.

3872280785 is a deficient number, since it is larger than the sum of its proper divisors (774456163).

3872280785 is an equidigital number, since it uses as much as digits as its factorization.

3872280785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774456162.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The square root of 3872280785 is about 62227.6528964415. The cubic root of 3872280785 is about 1570.3228385287.

The spelling of 3872280785 in words is "three billion, eight hundred seventy-two million, two hundred eighty thousand, seven hundred eighty-five".