320990052352 has 64 divisors (see below), whose sum is σ = 642756794400. Its totient is φ = 160298434560.

The previous prime is 320990052323. The next prime is 320990052353. The reversal of 320990052352 is 253250099023.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×320990052352² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320990052353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28863049 + ... + 28874167.

Almost surely, 2^320990052352 is an apocalyptic number.

320990052352 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320990052352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321378397200).

320990052352 is an abundant number, since it is smaller than the sum of its proper divisors (321766742048).

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

320990052352 is an frugal number, since it uses more digits than its factorization.

320990052352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030 (or 12002 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 40.

The spelling of 320990052352 in words is "three hundred twenty billion, nine hundred ninety million, fifty-two thousand, three hundred fifty-two".