28404147724 has 6 divisors (see below), whose sum is σ = 49707258524. Its totient is φ = 14202073860.

The previous prime is 28404147721. The next prime is 28404147833. The reversal of 28404147724 is 42774140482.

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 as a sum of consecutive naturals, namely, 3550518462 + ... + 3550518469.

Almost surely, 2^28404147724 is an apocalyptic number.

It is an amenable number.

28404147724 is a deficient number, since it is larger than the sum of its proper divisors (21303110800).

28404147724 is a wasteful number, since it uses less digits than its factorization.

28404147724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101036935 (or 7101036933 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 43.

The spelling of 28404147724 in words is "twenty-eight billion, four hundred four million, one hundred forty-seven thousand, seven hundred twenty-four".