28891488572 has 24 divisors (see below), whose sum is σ = 50979264000. Its totient is φ = 14326079040.

The previous prime is 28891488553. The next prime is 28891488611. The reversal of 28891488572 is 27588419882.

It is a super-2 number, since 2×28891488572² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 1382054 + ... + 1402802.

It is an arithmetic number, because the mean of its divisors is an integer number (2124136000).

Almost surely, 2^28891488572 is an apocalyptic number.

It is an amenable number.

28891488572 is a deficient number, since it is larger than the sum of its proper divisors (22087775428).

28891488572 is a wasteful number, since it uses less digits than its factorization.

28891488572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23621 (or 23619 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 62.

The spelling of 28891488572 in words is "twenty-eight billion, eight hundred ninety-one million, four hundred eighty-eight thousand, five hundred seventy-two".