506813458 has 4 divisors (see below), whose sum is σ = 760220190. Its totient is φ = 253406728.

The previous prime is 506813453. The next prime is 506813459. The reversal of 506813458 is 854318605.

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., 462551049 + 44262409 = 21507^2 + 6653^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 506813458.

It is not an unprimeable number, because it can be changed into a prime (506813453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126703363 + ... + 126703366.

Almost surely, 2^506813458 is an apocalyptic number.

506813458 is a deficient number, since it is larger than the sum of its proper divisors (253406732).

506813458 is a wasteful number, since it uses less digits than its factorization.

506813458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253406731.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 506813458 is about 22512.5178067670. The cubic root of 506813458 is about 797.2895029202.

The spelling of 506813458 in words is "five hundred six million, eight hundred thirteen thousand, four hundred fifty-eight".