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538 = 2269
BaseRepresentation
bin1000011010
3201221
420122
54123
62254
71366
oct1032
9657
10538
1144a
1238a
13325
142a6
1525d
hex21a

538 has 4 divisors (see below), whose sum is σ = 810. Its totient is φ = 268.

The previous prime is 523. The next prime is 541. The reversal of 538 is 835.

It can be divided in two parts, 53 and 8, that multiplied together give a palindrome (424).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835 = 5167.

It can be written as a sum of positive squares in only one way, i.e., 529 + 9 = 23^2 + 3^2 .

It is a magnanimous number.

It is a plaindrome in base 7, base 11, base 12 and base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133 + ... + 136.

538 is a deficient number, since it is larger than the sum of its proper divisors (272).

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

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

The sum of its prime factors is 271.

The product of its digits is 120, while the sum is 16.

The square root of 538 is about 23.1948270095. The cubic root of 538 is about 8.1331870140.

The spelling of 538 in words is "five hundred thirty-eight", and thus it is an aban number and an oban number.

Divisors: 1 2 269 538