378229905 has 40 divisors (see below), whose sum is σ = 684670272. Its totient is φ = 199742112.

The previous prime is 378229837. The next prime is 378229931. The reversal of 378229905 is 509922873.

It is not a de Polignac number, because 378229905 - 2⁷ = 378229777 is a prime.

It is a super-2 number, since 2×378229905² = 286115722072618050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 37182 + ... + 46248.

Almost surely, 2^378229905 is an apocalyptic number.

It is an amenable number.

378229905 is a deficient number, since it is larger than the sum of its proper divisors (306440367).

378229905 is a wasteful number, since it uses less digits than its factorization.

378229905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9187 (or 9178 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 378229905 is about 19448.1337150895. The cubic root of 378229905 is about 723.1892378391.

The spelling of 378229905 in words is "three hundred seventy-eight million, two hundred twenty-nine thousand, nine hundred five".