505386378 has 80 divisors (see below), whose sum is σ = 1312654464. Its totient is φ = 142339680.

The previous prime is 505386331. The next prime is 505386473. The reversal of 505386378 is 873683505.

505386378 is a `hidden beast` number, since 5 + 0 + 5 + 3 + 8 + 637 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 77376 + ... + 83652.

Almost surely, 2^505386378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505386378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656327232).

505386378 is an abundant number, since it is smaller than the sum of its proper divisors (807268086).

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

505386378 is a wasteful number, since it uses less digits than its factorization.

505386378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6369 (or 6360 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 505386378 is about 22480.8002081776. The cubic root of 505386378 is about 796.5404663067.

The spelling of 505386378 in words is "five hundred five million, three hundred eighty-six thousand, three hundred seventy-eight".