320404212 has 36 divisors (see below), whose sum is σ = 812150976. Its totient is φ = 106506000.

The previous prime is 320404211. The next prime is 320404243. The reversal of 320404212 is 212404023.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320404211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1087 + ... + 25337.

Almost surely, 2^320404212 is an apocalyptic number.

It is an amenable number.

320404212 is an abundant number, since it is smaller than the sum of its proper divisors (491746764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320404212 is a wasteful number, since it uses less digits than its factorization.

320404212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24628 (or 24623 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 320404212 is about 17899.8383232922. The cubic root of 320404212 is about 684.2782544923.

Adding to 320404212 its reverse (212404023), we get a palindrome (532808235).

The spelling of 320404212 in words is "three hundred twenty million, four hundred four thousand, two hundred twelve".