28687371 has 8 divisors (see below), whose sum is σ = 39912960. Its totient is φ = 18293352.

The previous prime is 28687367. The next prime is 28687387. The reversal of 28687371 is 17378682.

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

It is not a de Polignac number, because 28687371 - 2² = 28687367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28687301) 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, 207811 + ... + 207948.

It is an arithmetic number, because the mean of its divisors is an integer number (4989120).

Almost surely, 2^28687371 is an apocalyptic number.

28687371 is a deficient number, since it is larger than the sum of its proper divisors (11225589).

28687371 is a wasteful number, since it uses less digits than its factorization.

28687371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415785.

The product of its digits is 112896, while the sum is 42.

The square root of 28687371 is about 5356.0592789849. The cubic root of 28687371 is about 306.1236737904.

The spelling of 28687371 in words is "twenty-eight million, six hundred eighty-seven thousand, three hundred seventy-one".