8378505 has 32 divisors (see below), whose sum is σ = 15189120. Its totient is φ = 4380480.

The previous prime is 8378483. The next prime is 8378519. The reversal of 8378505 is 5058738.

It is a happy number.

8378505 is a `hidden beast` number, since 83 + 78 + 505 = 666.

It is not a de Polignac number, because 8378505 - 2¹² = 8374409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8378505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6570 + ... + 7740.

It is an arithmetic number, because the mean of its divisors is an integer number (474660).

Almost surely, 2^8378505 is an apocalyptic number.

It is an amenable number.

8378505 is a deficient number, since it is larger than the sum of its proper divisors (6810615).

8378505 is a wasteful number, since it uses less digits than its factorization.

8378505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 8378505 is about 2894.5647341181. The cubic root of 8378505 is about 203.1057308743.

The spelling of 8378505 in words is "eight million, three hundred seventy-eight thousand, five hundred five".