28894057 has 8 divisors (see below), whose sum is σ = 29393096. Its totient is φ = 28397952.

The previous prime is 28894051. The next prime is 28894081. The reversal of 28894057 is 75049882.

It can be written as a sum of positive squares in 4 ways, for example, as 12418576 + 16475481 = 3524^2 + 4059^2 .

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 28894057 - 2¹¹ = 28892009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28894051) 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, 28483 + ... + 29479.

It is an arithmetic number, because the mean of its divisors is an integer number (3674137).

Almost surely, 2^28894057 is an apocalyptic number.

It is an amenable number.

28894057 is a deficient number, since it is larger than the sum of its proper divisors (499039).

28894057 is an equidigital number, since it uses as much as digits as its factorization.

28894057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 28894057 is about 5375.3192463332. The cubic root of 28894057 is about 306.8570990867.

The spelling of 28894057 in words is "twenty-eight million, eight hundred ninety-four thousand, fifty-seven".