396720064 has 84 divisors (see below), whose sum is σ = 873303816. Its totient is φ = 178633728.

The previous prime is 396720047. The next prime is 396720083. The reversal of 396720064 is 460027693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464662 + ... + 465514.

It is an arithmetic number, because the mean of its divisors is an integer number (10396474).

Almost surely, 2^396720064 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 396720064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436651908).

396720064 is an abundant number, since it is smaller than the sum of its proper divisors (476583752).

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

396720064 is a wasteful number, since it uses less digits than its factorization.

396720064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 911 counting only the distinct ones).

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

The square root of 396720064 is about 19917.8328138380. The cubic root of 396720064 is about 734.7868720446.

The spelling of 396720064 in words is "three hundred ninety-six million, seven hundred twenty thousand, sixty-four".