28157485 has 8 divisors (see below), whose sum is σ = 33820416. Its totient is φ = 22505040.

The previous prime is 28157483. The next prime is 28157489. The reversal of 28157485 is 58475182.

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

It is not a de Polignac number, because 28157485 - 2¹ = 28157483 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 (28157483) 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, 5692 + ... + 9418.

It is an arithmetic number, because the mean of its divisors is an integer number (4227552).

Almost surely, 2^28157485 is an apocalyptic number.

It is an amenable number.

28157485 is a deficient number, since it is larger than the sum of its proper divisors (5662931).

28157485 is a wasteful number, since it uses less digits than its factorization.

28157485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243.

The product of its digits is 89600, while the sum is 40.

The square root of 28157485 is about 5306.3626902050. The cubic root of 28157485 is about 304.2271393702.

The spelling of 28157485 in words is "twenty-eight million, one hundred fifty-seven thousand, four hundred eighty-five".