505940858 has 4 divisors (see below), whose sum is σ = 758911290. Its totient is φ = 252970428.

The previous prime is 505940857. The next prime is 505940879. The reversal of 505940858 is 858049505.

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., 504137209 + 1803649 = 22453^2 + 1343^2 .

It is not an unprimeable number, because it can be changed into a prime (505940857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126485213 + ... + 126485216.

Almost surely, 2^505940858 is an apocalyptic number.

505940858 is a deficient number, since it is larger than the sum of its proper divisors (252970432).

505940858 is a wasteful number, since it uses less digits than its factorization.

505940858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252970431.

The product of its (nonzero) digits is 288000, while the sum is 44.

The square root of 505940858 is about 22493.1291286917. The cubic root of 505940858 is about 796.8316655107.

The spelling of 505940858 in words is "five hundred five million, nine hundred forty thousand, eight hundred fifty-eight".