28404004867 has 8 divisors (see below), whose sum is σ = 32482238976. Its totient is φ = 24330900552.

The previous prime is 28404004817. The next prime is 28404004883. The reversal of 28404004867 is 76840040482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28404004867 - 2³¹ = 26256521219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28404004817) 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, 1270573 + ... + 1292734.

It is an arithmetic number, because the mean of its divisors is an integer number (4060279872).

Almost surely, 2^28404004867 is an apocalyptic number.

28404004867 is a deficient number, since it is larger than the sum of its proper divisors (4078234109).

28404004867 is a wasteful number, since it uses less digits than its factorization.

28404004867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564897.

The product of its (nonzero) digits is 344064, while the sum is 43.

The spelling of 28404004867 in words is "twenty-eight billion, four hundred four million, four thousand, eight hundred sixty-seven".