390320172064 has 48 divisors (see below), whose sum is σ = 785408254848. Its totient is φ = 190857924352.

The previous prime is 390320172061. The next prime is 390320172071. The reversal of 390320172064 is 460271023093.

It is not an unprimeable number, because it can be changed into a prime (390320172061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1828494 + ... + 2030770.

It is an arithmetic number, because the mean of its divisors is an integer number (16362671976).

Almost surely, 2^390320172064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390320172064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392704127424).

390320172064 is an abundant number, since it is smaller than the sum of its proper divisors (395088082784).

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

390320172064 is a wasteful number, since it uses less digits than its factorization.

390320172064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203617 (or 203609 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 390320172064 in words is "three hundred ninety billion, three hundred twenty million, one hundred seventy-two thousand, sixty-four".