505738 has 4 divisors (see below), whose sum is σ = 758610. Its totient is φ = 252868.

The previous prime is 505727. The next prime is 505759. The reversal of 505738 is 837505.

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., 363609 + 142129 = 603^2 + 377^2 .

It is an Ulam number.

It is an unprimeable number.

505738 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126433 + ... + 126436.

2⁵⁰⁵⁷³⁸ is an apocalyptic number.

505738 is a deficient number, since it is larger than the sum of its proper divisors (252872).

505738 is a wasteful number, since it uses less digits than its factorization.

505738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252871.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 505738 is about 711.1525855961. The cubic root of 505738 is about 79.6725154190.

The spelling of 505738 in words is "five hundred five thousand, seven hundred thirty-eight".