505857378 has 32 divisors (see below), whose sum is σ = 1092522816. Its totient is φ = 155222208.

The previous prime is 505857371. The next prime is 505857397. The reversal of 505857378 is 873758505.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (505857371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20401 + ... + 37787.

It is an arithmetic number, because the mean of its divisors is an integer number (34141338).

Almost surely, 2^505857378 is an apocalyptic number.

505857378 is an abundant number, since it is smaller than the sum of its proper divisors (586665438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505857378 is a wasteful number, since it uses less digits than its factorization.

505857378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17778.

The product of its (nonzero) digits is 1176000, while the sum is 48.

The square root of 505857378 is about 22491.2733743557. The cubic root of 505857378 is about 796.7878374853.

The spelling of 505857378 in words is "five hundred five million, eight hundred fifty-seven thousand, three hundred seventy-eight".