28457085 has 8 divisors (see below), whose sum is σ = 45531360. Its totient is φ = 15177104.

The previous prime is 28457071. The next prime is 28457089. The reversal of 28457085 is 58075482.

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 28457085 - 2²² = 24262781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457089) 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, 948555 + ... + 948584.

It is an arithmetic number, because the mean of its divisors is an integer number (5691420).

Almost surely, 2^28457085 is an apocalyptic number.

It is an amenable number.

28457085 is a deficient number, since it is larger than the sum of its proper divisors (17074275).

28457085 is a wasteful number, since it uses less digits than its factorization.

28457085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897147.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 28457085 is about 5334.5182537882. The cubic root of 28457085 is about 305.3023428509.

The spelling of 28457085 in words is "twenty-eight million, four hundred fifty-seven thousand, eighty-five".