4381578728 has 16 divisors (see below), whose sum is σ = 8216657280. Its totient is φ = 2190470128.

The previous prime is 4381578703. The next prime is 4381578737. The reversal of 4381578728 is 8278751834.

It is a self number, because there is not a number n which added to its sum of digits gives 4381578728.

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, 24551 + ... + 96777.

It is an arithmetic number, because the mean of its divisors is an integer number (513541080).

Almost surely, 2^4381578728 is an apocalyptic number.

It is an amenable number.

4381578728 is a deficient number, since it is larger than the sum of its proper divisors (3835078552).

4381578728 is a wasteful number, since it uses less digits than its factorization.

4381578728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79816 (or 79812 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 53.

The square root of 4381578728 is about 66193.4946048326. The cubic root of 4381578728 is about 1636.3525333111.

The spelling of 4381578728 in words is "four billion, three hundred eighty-one million, five hundred seventy-eight thousand, seven hundred twenty-eight".