4021869385 has 8 divisors (see below), whose sum is σ = 4905362376. Its totient is φ = 3164749440.

The previous prime is 4021869361. The next prime is 4021869391. The reversal of 4021869385 is 5839681204.

It can be written as a sum of positive squares in 4 ways, for example, as 324864576 + 3697004809 = 18024^2 + 60803^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-4021869385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6592924 + ... + 6593533.

It is an arithmetic number, because the mean of its divisors is an integer number (613170297).

Almost surely, 2^4021869385 is an apocalyptic number.

It is an amenable number.

4021869385 is a deficient number, since it is larger than the sum of its proper divisors (883492991).

4021869385 is a wasteful number, since it uses less digits than its factorization.

4021869385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13186523.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 4021869385 is about 63418.2102002256. The cubic root of 4021869385 is about 1590.2887527210.

The spelling of 4021869385 in words is "four billion, twenty-one million, eight hundred sixty-nine thousand, three hundred eighty-five".