28357157 has 8 divisors (see below), whose sum is σ = 30282240. Its totient is φ = 26495280.

The previous prime is 28357151. The next prime is 28357171. The reversal of 28357157 is 75175382.

It is a happy number.

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 28357157 - 2⁴ = 28357141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28357157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14873 + ... + 16670.

It is an arithmetic number, because the mean of its divisors is an integer number (3785280).

Almost surely, 2^28357157 is an apocalyptic number.

It is an amenable number.

28357157 is a deficient number, since it is larger than the sum of its proper divisors (1925083).

28357157 is a wasteful number, since it uses less digits than its factorization.

28357157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31603.

The product of its digits is 58800, while the sum is 38.

The square root of 28357157 is about 5325.1438478223. The cubic root of 28357157 is about 304.9445639639.

The spelling of 28357157 in words is "twenty-eight million, three hundred fifty-seven thousand, one hundred fifty-seven".