28088454471 has 32 divisors (see below), whose sum is σ = 49150003200. Its totient is φ = 13823434080.

The previous prime is 28088454451. The next prime is 28088454479. The reversal of 28088454471 is 17445488082.

It is a happy number.

It is not a de Polignac number, because 28088454471 - 2⁹ = 28088453959 is a prime.

It is a super-3 number, since 3×28088454471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088454479) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3195481 + ... + 3204258.

It is an arithmetic number, because the mean of its divisors is an integer number (1535937600).

Almost surely, 2^28088454471 is an apocalyptic number.

28088454471 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28088454471 is a deficient number, since it is larger than the sum of its proper divisors (21061548729).

28088454471 is a wasteful number, since it uses less digits than its factorization.

28088454471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6399779.

The product of its (nonzero) digits is 2293760, while the sum is 51.

The spelling of 28088454471 in words is "twenty-eight billion, eighty-eight million, four hundred fifty-four thousand, four hundred seventy-one".