378911871 has 24 divisors (see below), whose sum is σ = 605114160. Its totient is φ = 232952112.

The previous prime is 378911843. The next prime is 378911891. The reversal of 378911871 is 178119873.

It is a happy number.

It is not a de Polignac number, because 378911871 - 2⁵ = 378911839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378911831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364170 + ... + 365208.

It is an arithmetic number, because the mean of its divisors is an integer number (25213090).

Almost surely, 2^378911871 is an apocalyptic number.

378911871 is a deficient number, since it is larger than the sum of its proper divisors (226202289).

378911871 is an equidigital number, since it uses as much as digits as its factorization.

378911871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100 (or 1055 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The square root of 378911871 is about 19465.6587610078. The cubic root of 378911871 is about 723.6236247440.

The spelling of 378911871 in words is "three hundred seventy-eight million, nine hundred eleven thousand, eight hundred seventy-one".