28680157 has 8 divisors (see below), whose sum is σ = 31385952. Its totient is φ = 25990800.

The previous prime is 28680137. The next prime is 28680163. The reversal of 28680157 is 75108682.

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

It is not a de Polignac number, because 28680157 - 2¹¹ = 28678109 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 (28680107) 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, 298 + ... + 7579.

It is an arithmetic number, because the mean of its divisors is an integer number (3923244).

Almost surely, 2^28680157 is an apocalyptic number.

It is an amenable number.

28680157 is a deficient number, since it is larger than the sum of its proper divisors (2705795).

28680157 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 28680157 = (58862701)₉.

28680157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8219.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28680157 is about 5355.3857937594. The cubic root of 28680157 is about 306.0980113793.

The spelling of 28680157 in words is "twenty-eight million, six hundred eighty thousand, one hundred fifty-seven".