28671587 has 8 divisors (see below), whose sum is σ = 33567072. Its totient is φ = 23976000.

The previous prime is 28671557. The next prime is 28671611. The reversal of 28671587 is 78517682.

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

It is a cyclic number.

It is not a de Polignac number, because 28671587 - 2⁶ = 28671523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28671527) 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, 49664 + ... + 50237.

It is an arithmetic number, because the mean of its divisors is an integer number (4195884).

Almost surely, 2^28671587 is an apocalyptic number.

28671587 is a deficient number, since it is larger than the sum of its proper divisors (4895485).

28671587 is an equidigital number, since it uses as much as digits as its factorization.

28671587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99949.

The product of its digits is 188160, while the sum is 44.

The square root of 28671587 is about 5354.5856048811. The cubic root of 28671587 is about 306.0675196670.

The spelling of 28671587 in words is "twenty-eight million, six hundred seventy-one thousand, five hundred eighty-seven".