28804121401 has 4 divisors (see below), whose sum is σ = 31422677904. Its totient is φ = 26185564900.

The previous prime is 28804121393. The next prime is 28804121407. The reversal of 28804121401 is 10412140882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28804121401 - 2³ = 28804121393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28804121407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309278235 + ... + 1309278256.

It is an arithmetic number, because the mean of its divisors is an integer number (7855669476).

Almost surely, 2^28804121401 is an apocalyptic number.

It is an amenable number.

28804121401 is a deficient number, since it is larger than the sum of its proper divisors (2618556503).

28804121401 is a wasteful number, since it uses less digits than its factorization.

28804121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618556502.

The product of its (nonzero) digits is 4096, while the sum is 31.

The spelling of 28804121401 in words is "twenty-eight billion, eight hundred four million, one hundred twenty-one thousand, four hundred one".