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28390253 is a prime number
BaseRepresentation
bin110110001001…
…1001101101101
31222102101002212
41230103031231
524231442003
62452300205
7463212263
oct154231555
958371085
1028390253
1115031021
129611665
135b60388
143ab0433
15275bdd8
hex1b1336d

28390253 has 2 divisors, whose sum is σ = 28390254. Its totient is φ = 28390252.

The previous prime is 28390247. The next prime is 28390259. The reversal of 28390253 is 35209382.

It is a balanced prime because it is at equal distance from previous prime (28390247) and next prime (28390259).

It can be written as a sum of positive squares in only one way, i.e., 19166884 + 9223369 = 4378^2 + 3037^2 .

It is a cyclic number.

It is not a de Polignac number, because 28390253 - 216 = 28324717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28390259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14195126 + 14195127.

It is an arithmetic number, because the mean of its divisors is an integer number (14195127).

Almost surely, 228390253 is an apocalyptic number.

It is an amenable number.

28390253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28390253 is an equidigital number, since it uses as much as digits as its factorization.

28390253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 28390253 is about 5328.2504633322. The cubic root of 28390253 is about 305.0631527384.

The spelling of 28390253 in words is "twenty-eight million, three hundred ninety thousand, two hundred fifty-three".