322640378 has 4 divisors (see below), whose sum is σ = 483960570. Its totient is φ = 161320188.

The previous prime is 322640377. The next prime is 322640411. The reversal of 322640378 is 873046223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 174847729 + 147792649 = 13223^2 + 12157^2 .

It is not an unprimeable number, because it can be changed into a prime (322640377) 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 as a sum of consecutive naturals, namely, 80660093 + ... + 80660096.

Almost surely, 2^322640378 is an apocalyptic number.

322640378 is a deficient number, since it is larger than the sum of its proper divisors (161320192).

322640378 is a wasteful number, since it uses less digits than its factorization.

322640378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161320191.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 322640378 is about 17962.1930175577. The cubic root of 322640378 is about 685.8664709632.

The spelling of 322640378 in words is "three hundred twenty-two million, six hundred forty thousand, three hundred seventy-eight".