505378366 has 4 divisors (see below), whose sum is σ = 758067552. Its totient is φ = 252689182.

The previous prime is 505378327. The next prime is 505378369. The reversal of 505378366 is 663873505.

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 (505378369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126344590 + ... + 126344593.

It is an arithmetic number, because the mean of its divisors is an integer number (189516888).

Almost surely, 2^505378366 is an apocalyptic number.

505378366 is a deficient number, since it is larger than the sum of its proper divisors (252689186).

505378366 is a wasteful number, since it uses less digits than its factorization.

505378366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252689185.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 505378366 is about 22480.6220109676. The cubic root of 505378366 is about 796.5362570415.

The spelling of 505378366 in words is "five hundred five million, three hundred seventy-eight thousand, three hundred sixty-six".