28404147723 has 16 divisors (see below), whose sum is σ = 45828541440. Its totient is φ = 15276180096.

The previous prime is 28404147721. The next prime is 28404147833. The reversal of 28404147723 is 32774140482.

It is not a de Polignac number, because 28404147723 - 2¹ = 28404147721 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 39781363 + ... + 39782076.

It is an arithmetic number, because the mean of its divisors is an integer number (2864283840).

Almost surely, 2^28404147723 is an apocalyptic number.

28404147723 is a deficient number, since it is larger than the sum of its proper divisors (17424393717).

28404147723 is a wasteful number, since it uses less digits than its factorization.

28404147723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79563466.

The product of its (nonzero) digits is 301056, while the sum is 42.

The spelling of 28404147723 in words is "twenty-eight billion, four hundred four million, one hundred forty-seven thousand, seven hundred twenty-three".