378005905 has 16 divisors (see below), whose sum is σ = 468293760. Its totient is φ = 292739328.

The previous prime is 378005891. The next prime is 378005941. The reversal of 378005905 is 509500873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378005905 is a prime.

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, 16516 + ... + 32074.

It is an arithmetic number, because the mean of its divisors is an integer number (29268360).

Almost surely, 2^378005905 is an apocalyptic number.

It is an amenable number.

378005905 is a deficient number, since it is larger than the sum of its proper divisors (90287855).

378005905 is a wasteful number, since it uses less digits than its factorization.

378005905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15720.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 378005905 is about 19442.3739548441. The cubic root of 378005905 is about 723.0464442832.

The spelling of 378005905 in words is "three hundred seventy-eight million, five thousand, nine hundred five".