28647604019 has 4 divisors (see below), whose sum is σ = 28915338744. Its totient is φ = 28379869296.

The previous prime is 28647604001. The next prime is 28647604031. The reversal of 28647604019 is 91040674682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28647604019 - 2¹⁶ = 28647538483 is a prime.

It is a super-2 number, since 2×28647604019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28647609019) 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, 133867202 + ... + 133867415.

It is an arithmetic number, because the mean of its divisors is an integer number (7228834686).

Almost surely, 2^28647604019 is an apocalyptic number.

28647604019 is a deficient number, since it is larger than the sum of its proper divisors (267734725).

28647604019 is a wasteful number, since it uses less digits than its factorization.

28647604019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267734724.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 28647604019 in words is "twenty-eight billion, six hundred forty-seven million, six hundred four thousand, nineteen".