378217329 has 24 divisors (see below), whose sum is σ = 605553408. Its totient is φ = 209149920.

The previous prime is 378217321. The next prime is 378217351. The reversal of 378217329 is 923712873.

It is not a de Polignac number, because 378217329 - 2³ = 378217321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378217321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36942 + ... + 46055.

It is an arithmetic number, because the mean of its divisors is an integer number (25231392).

Almost surely, 2^378217329 is an apocalyptic number.

It is an amenable number.

378217329 is a deficient number, since it is larger than the sum of its proper divisors (227336079).

378217329 is a wasteful number, since it uses less digits than its factorization.

378217329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83045 (or 83038 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 378217329 is about 19447.8103908898. The cubic root of 378217329 is about 723.1812224949.

It can be divided in two parts, 37821 and 7329, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 378217329 in words is "three hundred seventy-eight million, two hundred seventeen thousand, three hundred twenty-nine".