28414580821 has 4 divisors (see below), whose sum is σ = 30997724544. Its totient is φ = 25831437100.

The previous prime is 28414580819. The next prime is 28414580863. The reversal of 28414580821 is 12808541482.

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 a cyclic number.

It is not a de Polignac number, because 28414580821 - 2¹ = 28414580819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28414580891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291571845 + ... + 1291571866.

It is an arithmetic number, because the mean of its divisors is an integer number (7749431136).

Almost surely, 2^28414580821 is an apocalyptic number.

It is an amenable number.

28414580821 is a deficient number, since it is larger than the sum of its proper divisors (2583143723).

28414580821 is a wasteful number, since it uses less digits than its factorization.

28414580821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583143722.

The product of its (nonzero) digits is 163840, while the sum is 43.

The spelling of 28414580821 in words is "twenty-eight billion, four hundred fourteen million, five hundred eighty thousand, eight hundred twenty-one".