28173357 has 6 divisors (see below), whose sum is σ = 40694862. Its totient is φ = 18782232.

The previous prime is 28173331. The next prime is 28173361. The reversal of 28173357 is 75337182.

It can be written as a sum of positive squares in only one way, i.e., 16208676 + 11964681 = 4026^2 + 3459^2 .

It is not a de Polignac number, because 28173357 - 2⁶ = 28173293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28173307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1565178 + ... + 1565195.

It is an arithmetic number, because the mean of its divisors is an integer number (6782477).

Almost surely, 2^28173357 is an apocalyptic number.

It is an amenable number.

28173357 is a deficient number, since it is larger than the sum of its proper divisors (12521505).

28173357 is a wasteful number, since it uses less digits than its factorization.

28173357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130379 (or 3130376 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 28173357 is about 5307.8580425629. The cubic root of 28173357 is about 304.2842915644.

The spelling of 28173357 in words is "twenty-eight million, one hundred seventy-three thousand, three hundred fifty-seven".