28301087 has 4 divisors (see below), whose sum is σ = 28560840. Its totient is φ = 28041336.

The previous prime is 28301083. The next prime is 28301093. The reversal of 28301087 is 78010382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28301087 - 2² = 28301083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28301081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129713 + ... + 129930.

It is an arithmetic number, because the mean of its divisors is an integer number (7140210).

Almost surely, 2^28301087 is an apocalyptic number.

28301087 is a deficient number, since it is larger than the sum of its proper divisors (259753).

28301087 is a wasteful number, since it uses less digits than its factorization.

28301087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259752.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28301087 is about 5319.8765963131. The cubic root of 28301087 is about 304.7434445613.

The spelling of 28301087 in words is "twenty-eight million, three hundred one thousand, eighty-seven".