505252778 has 8 divisors (see below), whose sum is σ = 758068740. Its totient is φ = 252563200.

The previous prime is 505252771. The next prime is 505252817. The reversal of 505252778 is 877252505.

It can be written as a sum of positive squares in 2 ways, for example, as 505215529 + 37249 = 22477^2 + 193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (505252771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20873 + ... + 38028.

Almost surely, 2^505252778 is an apocalyptic number.

505252778 is a deficient number, since it is larger than the sum of its proper divisors (252815962).

505252778 is a wasteful number, since it uses less digits than its factorization.

505252778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63192.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 505252778 is about 22477.8285872991. The cubic root of 505252778 is about 796.4702710465.

The spelling of 505252778 in words is "five hundred five million, two hundred fifty-two thousand, seven hundred seventy-eight".