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28930579 = 167191907
BaseRepresentation
bin110111001011…
…1001000010011
32000102211021221
41232113020103
524401234304
62512025511
7500622466
oct156271023
960384257
1028930579
111536aa77
129832297
135cbc2b2
143bb12dd
152817054
hex1b97213

28930579 has 8 divisors (see below), whose sum is σ = 29288448. Its totient is φ = 28575240.

The previous prime is 28930571. The next prime is 28930613. The reversal of 28930579 is 97503982.

It is a happy number.

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 28930579 - 23 = 28930571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28930571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31444 + ... + 32350.

It is an arithmetic number, because the mean of its divisors is an integer number (3661056).

Almost surely, 228930579 is an apocalyptic number.

28930579 is a deficient number, since it is larger than the sum of its proper divisors (357869).

28930579 is a wasteful number, since it uses less digits than its factorization.

28930579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 28930579 is about 5378.7153670742. The cubic root of 28930579 is about 306.9863334641.

The spelling of 28930579 in words is "twenty-eight million, nine hundred thirty thousand, five hundred seventy-nine".

Divisors: 1 167 191 907 31897 151469 173237 28930579