28004407475 has 12 divisors (see below), whose sum is σ = 37882326120. Its totient is φ = 20366841600.

The previous prime is 28004407471. The next prime is 28004407507. The reversal of 28004407475 is 57470440082.

It is a happy number.

It is not a de Polignac number, because 28004407475 - 2² = 28004407471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28004407471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50916830 + ... + 50917379.

It is an arithmetic number, because the mean of its divisors is an integer number (3156860510).

Almost surely, 2^28004407475 is an apocalyptic number.

28004407475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28004407475 is a deficient number, since it is larger than the sum of its proper divisors (9877918645).

28004407475 is a wasteful number, since it uses less digits than its factorization.

28004407475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101834230 (or 101834225 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 41.

The spelling of 28004407475 in words is "twenty-eight billion, four million, four hundred seven thousand, four hundred seventy-five".