28894657 has 8 divisors (see below), whose sum is σ = 31966272. Its totient is φ = 25897200.

The previous prime is 28894639. The next prime is 28894661. The reversal of 28894657 is 75649882.

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 28894657 - 2⁷ = 28894529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28894657.

It is not an unprimeable number, because it can be changed into a prime (28894637) 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, 17718 + ... + 19279.

It is an arithmetic number, because the mean of its divisors is an integer number (3995784).

Almost surely, 2^28894657 is an apocalyptic number.

It is an amenable number.

28894657 is a deficient number, since it is larger than the sum of its proper divisors (3071615).

28894657 is a wasteful number, since it uses less digits than its factorization.

28894657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37079.

The product of its digits is 967680, while the sum is 49.

The square root of 28894657 is about 5375.3750566821. The cubic root of 28894657 is about 306.8592230874.

The spelling of 28894657 in words is "twenty-eight million, eight hundred ninety-four thousand, six hundred fifty-seven".