505091394 has 24 divisors (see below), whose sum is σ = 1104409020. Its totient is φ = 166818528.

The previous prime is 505091393. The next prime is 505091399. The reversal of 505091394 is 493190505.

505091394 is a `hidden beast` number, since 50 + 509 + 13 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 496710369 + 8381025 = 22287^2 + 2895^2 .

It is not an unprimeable number, because it can be changed into a prime (505091393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126757 + ... + 130680.

Almost surely, 2^505091394 is an apocalyptic number.

505091394 is an abundant number, since it is smaller than the sum of its proper divisors (599317626).

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

505091394 is a wasteful number, since it uses less digits than its factorization.

505091394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257554 (or 257551 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 505091394 is about 22474.2384520588. The cubic root of 505091394 is about 796.3854611904.

The spelling of 505091394 in words is "five hundred five million, ninety-one thousand, three hundred ninety-four".