28450657 has 8 divisors (see below), whose sum is σ = 30310560. Its totient is φ = 26627040.

The previous prime is 28450633. The next prime is 28450663. The reversal of 28450657 is 75605482.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28450657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28450627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7444 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (3788820).

Almost surely, 2^28450657 is an apocalyptic number.

It is an amenable number.

28450657 is a deficient number, since it is larger than the sum of its proper divisors (1859903).

28450657 is a wasteful number, since it uses less digits than its factorization.

28450657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18143.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 28450657 is about 5333.9157286181. The cubic root of 28450657 is about 305.2793534824.

The spelling of 28450657 in words is "twenty-eight million, four hundred fifty thousand, six hundred fifty-seven".