320212978 has 4 divisors (see below), whose sum is σ = 480319470. Its totient is φ = 160106488.

The previous prime is 320212957. The next prime is 320212979. The reversal of 320212978 is 879212023.

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., 240343009 + 79869969 = 15503^2 + 8937^2 .

It is not an unprimeable number, because it can be changed into a prime (320212979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80053243 + ... + 80053246.

Almost surely, 2^320212978 is an apocalyptic number.

320212978 is a deficient number, since it is larger than the sum of its proper divisors (160106492).

320212978 is a wasteful number, since it uses less digits than its factorization.

320212978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160106491.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 320212978 is about 17894.4957458991. The cubic root of 320212978 is about 684.1420897087.

The spelling of 320212978 in words is "three hundred twenty million, two hundred twelve thousand, nine hundred seventy-eight".