1396395520 has 80 divisors (see below), whose sum is σ = 3605706720. Its totient is φ = 515579904.

The previous prime is 1396395491. The next prime is 1396395541. The reversal of 1396395520 is 255936931.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12301 + ... + 54259.

It is an arithmetic number, because the mean of its divisors is an integer number (45071334).

Almost surely, 2^1396395520 is an apocalyptic number.

1396395520 is a gapful number since it is divisible by the number (10) 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 1396395520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1802853360).

1396395520 is an abundant number, since it is smaller than the sum of its proper divisors (2209311200).

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

1396395520 is an equidigital number, since it uses as much as digits as its factorization.

1396395520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41995 (or 41979 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 1396395520 is about 37368.3759347393. The cubic root of 1396395520 is about 1117.7280474558.

The spelling of 1396395520 in words is "one billion, three hundred ninety-six million, three hundred ninety-five thousand, five hundred twenty".