505453878 has 32 divisors (see below), whose sum is σ = 1124776800. Its totient is φ = 168252768.

The previous prime is 505453849. The next prime is 505453931. The reversal of 505453878 is 878354505.

505453878 is a `hidden beast` number, since 5 + 0 + 545 + 38 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35688 + ... + 47796.

It is an arithmetic number, because the mean of its divisors is an integer number (35149275).

Almost surely, 2^505453878 is an apocalyptic number.

505453878 is an abundant number, since it is smaller than the sum of its proper divisors (619322922).

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

505453878 is a wasteful number, since it uses less digits than its factorization.

505453878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12893 (or 12887 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The square root of 505453878 is about 22482.3014391321. The cubic root of 505453878 is about 796.5759270224.

The spelling of 505453878 in words is "five hundred five million, four hundred fifty-three thousand, eight hundred seventy-eight".