28478571432 has 32 divisors (see below), whose sum is σ = 71206387200. Its totient is φ = 9491529344.

The previous prime is 28478571421. The next prime is 28478571449. The reversal of 28478571432 is 23417587482.

It is a happy number.

It is a super-2 number, since 2×28478571432² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100444 + ... + 258932.

It is an arithmetic number, because the mean of its divisors is an integer number (2225199600).

Almost surely, 2^28478571432 is an apocalyptic number.

It is an amenable number.

28478571432 is an abundant number, since it is smaller than the sum of its proper divisors (42727815768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28478571432 is a wasteful number, since it uses less digits than its factorization.

28478571432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165985 (or 165981 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 51.

The spelling of 28478571432 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred seventy-one thousand, four hundred thirty-two".