28872371 has 12 divisors (see below), whose sum is σ = 32631144. Its totient is φ = 25334400.

The previous prime is 28872359. The next prime is 28872379. The reversal of 28872371 is 17327882.

It is not a de Polignac number, because 28872371 - 2¹⁰ = 28871347 is a prime.

It is a super-3 number, since 3×28872371³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28872379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7691 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (2719262).

Almost surely, 2^28872371 is an apocalyptic number.

28872371 is a deficient number, since it is larger than the sum of its proper divisors (3758773).

28872371 is a wasteful number, since it uses less digits than its factorization.

28872371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190 (or 3161 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 28872371 is about 5373.3016851839. The cubic root of 28872371 is about 306.7803108790.

The spelling of 28872371 in words is "twenty-eight million, eight hundred seventy-two thousand, three hundred seventy-one".