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28313041 = 1723132
BaseRepresentation
bin110110000000…
…0010111010001
31222021110012011
41230000113101
524222004131
62450502521
7462441211
oct154002721
958243164
1028313041
1114a89009
129594a41
135b341a3
143a90241
1527440b1
hex1b005d1

28313041 has 9 divisors (see below), whose sum is σ = 30172881. Its totient is φ = 26562432.

The previous prime is 28313017. The next prime is 28313063. The reversal of 28313041 is 14031382.

The square root of 28313041 is 5321.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4498641 + 23814400 = 2121^2 + 4880^2 .

It is not a de Polignac number, because 28313041 - 25 = 28313009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28313081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 90301 + ... + 90613.

Almost surely, 228313041 is an apocalyptic number.

28313041 is the 5321-st square number.

28313041 is the 2661-st centered octagonal number.

It is an amenable number.

28313041 is a deficient number, since it is larger than the sum of its proper divisors (1859840).

28313041 is an frugal number, since it uses more digits than its factorization.

28313041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The cubic root of 28313041 is about 304.7863450378.

Multiplying 28313041 by its product of nonzero digits (576), we get a square (16308311616 = 1277042).

The spelling of 28313041 in words is "twenty-eight million, three hundred thirteen thousand, forty-one".

Divisors: 1 17 289 313 5321 90457 97969 1665473 28313041