396123520 has 128 divisors (see below), whose sum is σ = 1042554240. Its totient is φ = 143007744.

The previous prime is 396123491. The next prime is 396123521. The reversal of 396123520 is 25321693.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396123521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390534 + ... + 391546.

It is an arithmetic number, because the mean of its divisors is an integer number (8144955).

Almost surely, 2^396123520 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 396123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521277120).

396123520 is an abundant number, since it is smaller than the sum of its proper divisors (646430720).

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

396123520 is a wasteful number, since it uses less digits than its factorization.

396123520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 396123520 is about 19902.8520569289. The cubic root of 396123520 is about 734.4183900604.

The spelling of 396123520 in words is "three hundred ninety-six million, one hundred twenty-three thousand, five hundred twenty".