28323057 has 32 divisors (see below), whose sum is σ = 45015040. Its totient is φ = 15500160.

The previous prime is 28323047. The next prime is 28323067. The reversal of 28323057 is 75032382.

It is an interprime number because it is at equal distance from previous prime (28323047) and next prime (28323067).

It is not a de Polignac number, because 28323057 - 2¹⁶ = 28257521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28323047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90333 + ... + 90645.

It is an arithmetic number, because the mean of its divisors is an integer number (1406720).

Almost surely, 2^28323057 is an apocalyptic number.

It is an amenable number.

28323057 is a deficient number, since it is larger than the sum of its proper divisors (16691983).

28323057 is a wasteful number, since it uses less digits than its factorization.

28323057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 28323057 is about 5321.9410932478. The cubic root of 28323057 is about 304.8222811296.

The spelling of 28323057 in words is "twenty-eight million, three hundred twenty-three thousand, fifty-seven".