28425157 has 4 divisors (see below), whose sum is σ = 28435840. Its totient is φ = 28414476.

The previous prime is 28425143. The next prime is 28425161. The reversal of 28425157 is 75152482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28425157 - 2⁷ = 28425029 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 (28425127) 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, 2194 + ... + 7852.

It is an arithmetic number, because the mean of its divisors is an integer number (7108960).

Almost surely, 2^28425157 is an apocalyptic number.

It is an amenable number.

28425157 is a deficient number, since it is larger than the sum of its proper divisors (10683).

28425157 is an equidigital number, since it uses as much as digits as its factorization.

28425157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10682.

The product of its digits is 22400, while the sum is 34.

The square root of 28425157 is about 5331.5248287896. The cubic root of 28425157 is about 305.1881200833.

It can be divided in two parts, 28425 and 157, that added together give a palindrome (28582).

The spelling of 28425157 in words is "twenty-eight million, four hundred twenty-five thousand, one hundred fifty-seven".