378905685 has 16 divisors (see below), whose sum is σ = 606561216. Its totient is φ = 201979008.

The previous prime is 378905671. The next prime is 378905689. The reversal of 378905685 is 586509873.

It is not a de Polignac number, because 378905685 - 2⁴ = 378905669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378905689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30342 + ... + 40968.

It is an arithmetic number, because the mean of its divisors is an integer number (37910076).

Almost surely, 2^378905685 is an apocalyptic number.

It is an amenable number.

378905685 is a deficient number, since it is larger than the sum of its proper divisors (227655531).

378905685 is a wasteful number, since it uses less digits than its factorization.

378905685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13012.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The square root of 378905685 is about 19465.4998651460. The cubic root of 378905685 is about 723.6196868361.

The spelling of 378905685 in words is "three hundred seventy-eight million, nine hundred five thousand, six hundred eighty-five".