28901057 has 2 divisors, whose sum is σ = 28901058. Its totient is φ = 28901056.

The previous prime is 28901029. The next prime is 28901063. The reversal of 28901057 is 75010982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 9461776 = 4409^2 + 3076^2 .

It is a cyclic number.

It is not a de Polignac number, because 28901057 - 2⁸ = 28900801 is a prime.

It is a super-3 number, since 3×28901057³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28901017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14450528 + 14450529.

It is an arithmetic number, because the mean of its divisors is an integer number (14450529).

Almost surely, 2^28901057 is an apocalyptic number.

It is an amenable number.

28901057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28901057 is an equidigital number, since it uses as much as digits as its factorization.

28901057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 28901057 is about 5375.9703310193. The cubic root of 28901057 is about 306.8818772647.

The spelling of 28901057 in words is "twenty-eight million, nine hundred one thousand, fifty-seven".