320353734420 has 54 divisors (see below), whose sum is σ = 971762695722. Its totient is φ = 85425637536.

The previous prime is 320353734403. The next prime is 320353734431. The reversal of 320353734420 is 24437353023.

320353734420 is a `hidden beast` number, since 3 + 203 + 5 + 3 + 7 + 3 + 442 + 0 = 666.

It can be written as a sum of positive squares in only one way, i.e., 256282987536 + 64070746884 = 506244^2 + 253122^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7572567 + ... + 7614753.

Almost surely, 2^320353734420 is an apocalyptic number.

320353734420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320353734420 is an abundant number, since it is smaller than the sum of its proper divisors (651408961302).

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

320353734420 is an frugal number, since it uses more digits than its factorization.

320353734420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84389 (or 42197 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 36.

The spelling of 320353734420 in words is "three hundred twenty billion, three hundred fifty-three million, seven hundred thirty-four thousand, four hundred twenty".