28404147722 has 16 divisors (see below), whose sum is σ = 43196276040. Its totient is φ = 14005446912.

The previous prime is 28404147721. The next prime is 28404147833. The reversal of 28404147722 is 22774140482.

It can be written as a sum of positive squares in 4 ways, for example, as 26322142081 + 2082005641 = 162241^2 + 45629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28404147722.

It is not an unprimeable number, because it can be changed into a prime (28404147721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1557368 + ... + 1575500.

Almost surely, 2^28404147722 is an apocalyptic number.

28404147722 is a deficient number, since it is larger than the sum of its proper divisors (14792128318).

28404147722 is a wasteful number, since it uses less digits than its factorization.

28404147722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28937.

The product of its (nonzero) digits is 200704, while the sum is 41.

The spelling of 28404147722 in words is "twenty-eight billion, four hundred four million, one hundred forty-seven thousand, seven hundred twenty-two".