28550157 has 8 divisors (see below), whose sum is σ = 40306176. Its totient is φ = 17913792.

The previous prime is 28550099. The next prime is 28550201. The reversal of 28550157 is 75105582.

It is a happy number.

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

It is not a de Polignac number, because 28550157 - 2⁸ = 28549901 is a prime.

It is a super-2 number, since 2×28550157² = 1630222929449298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550057) 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, 279853 + ... + 279954.

It is an arithmetic number, because the mean of its divisors is an integer number (5038272).

Almost surely, 2^28550157 is an apocalyptic number.

It is an amenable number.

28550157 is a deficient number, since it is larger than the sum of its proper divisors (11756019).

28550157 is a wasteful number, since it uses less digits than its factorization.

28550157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559827.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 28550157 is about 5343.2346944524. The cubic root of 28550157 is about 305.6348221801.

The spelling of 28550157 in words is "twenty-eight million, five hundred fifty thousand, one hundred fifty-seven".