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458 = 2229
BaseRepresentation
bin111001010
3121222
413022
53313
62042
71223
oct712
9558
10458
11387
12322
13293
1424a
15208
hex1ca

458 has 4 divisors (see below), whose sum is σ = 690. Its totient is φ = 228.

The previous prime is 457. The next prime is 461. The reversal of 458 is 854.

Subtracting from 458 its sum of digits (17), we obtain a square (441 = 212).

It can be divided in two parts, 4 and 58, that multiplied together give a palindrome (232).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 289 + 169 = 17^2 + 13^2 .

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 7, base 9, base 10 and base 14.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113 + ... + 116.

458 is a deficient number, since it is larger than the sum of its proper divisors (232).

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

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

The sum of its prime factors is 231.

The product of its digits is 160, while the sum is 17.

The square root of 458 is about 21.4009345590. The cubic root of 458 is about 7.7082387782.

The spelling of 458 in words is "four hundred fifty-eight", and thus it is an aban number.

Divisors: 1 2 229 458