378304221 has 8 divisors (see below), whose sum is σ = 506797024. Its totient is φ = 251007120.

The previous prime is 378304211. The next prime is 378304237. The reversal of 378304221 is 122403873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 378304221 - 2⁵ = 378304189 is a prime.

It is a super-2 number, since 2×378304221² = 286228167252833682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378304211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298186 + ... + 299451.

It is an arithmetic number, because the mean of its divisors is an integer number (63349628).

Almost surely, 2^378304221 is an apocalyptic number.

It is an amenable number.

378304221 is a deficient number, since it is larger than the sum of its proper divisors (128492803).

378304221 is a wasteful number, since it uses less digits than its factorization.

378304221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597851.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 378304221 is about 19450.0442415949. The cubic root of 378304221 is about 723.2365996960.

The spelling of 378304221 in words is "three hundred seventy-eight million, three hundred four thousand, two hundred twenty-one".