28556157 has 8 divisors (see below), whose sum is σ = 43514176. Its totient is φ = 16317792.

The previous prime is 28556153. The next prime is 28556159. The reversal of 28556157 is 75165582.

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

It is not a de Polignac number, because 28556157 - 2² = 28556153 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 (28556153) 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, 679888 + ... + 679929.

It is an arithmetic number, because the mean of its divisors is an integer number (5439272).

Almost surely, 2^28556157 is an apocalyptic number.

It is an amenable number.

28556157 is a deficient number, since it is larger than the sum of its proper divisors (14958019).

28556157 is a wasteful number, since it uses less digits than its factorization.

28556157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359827.

The product of its digits is 84000, while the sum is 39.

The square root of 28556157 is about 5343.7961226080. The cubic root of 28556157 is about 305.6562310581.

The spelling of 28556157 in words is "twenty-eight million, five hundred fifty-six thousand, one hundred fifty-seven".