28721576419 has 8 divisors (see below), whose sum is σ = 28760304672. Its totient is φ = 28682871360.

The previous prime is 28721576371. The next prime is 28721576431. The reversal of 28721576419 is 91467512782.

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

It is a cyclic number.

It is not a de Polignac number, because 28721576419 - 2³¹ = 26574092771 is a prime.

It is a super-2 number, since 2×28721576419² (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 (28721577419) 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, 5134314 + ... + 5139904.

It is an arithmetic number, because the mean of its divisors is an integer number (3595038084).

Almost surely, 2^28721576419 is an apocalyptic number.

28721576419 is a deficient number, since it is larger than the sum of its proper divisors (38728253).

28721576419 is a wasteful number, since it uses less digits than its factorization.

28721576419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11597.

The product of its digits is 1693440, while the sum is 52.

The spelling of 28721576419 in words is "twenty-eight billion, seven hundred twenty-one million, five hundred seventy-six thousand, four hundred nineteen".