505388894 has 4 divisors (see below), whose sum is σ = 758083344. Its totient is φ = 252694446.

The previous prime is 505388881. The next prime is 505388899. The reversal of 505388894 is 498883505.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505388899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126347222 + ... + 126347225.

It is an arithmetic number, because the mean of its divisors is an integer number (189520836).

Almost surely, 2^505388894 is an apocalyptic number.

505388894 is a deficient number, since it is larger than the sum of its proper divisors (252694450).

505388894 is a wasteful number, since it uses less digits than its factorization.

505388894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252694449.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 505388894 is about 22480.8561669702. The cubic root of 505388894 is about 796.5417881287.

The spelling of 505388894 in words is "five hundred five million, three hundred eighty-eight thousand, eight hundred ninety-four".