1393445376 has 80 divisors (see below), whose sum is σ = 4124736000. Its totient is φ = 464477184.

The previous prime is 1393445359. The next prime is 1393445377. The reversal of 1393445376 is 6735443931.

1393445376 is a `hidden beast` number, since 139 + 3 + 445 + 3 + 76 = 666.

It is not an unprimeable number, because it can be changed into a prime (1393445377) 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, 36576 + ... + 64223.

It is an arithmetic number, because the mean of its divisors is an integer number (51559200).

Almost surely, 2^1393445376 is an apocalyptic number.

1393445376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1393445376 is an abundant number, since it is smaller than the sum of its proper divisors (2731290624).

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

1393445376 is an equidigital number, since it uses as much as digits as its factorization.

1393445376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100826 (or 100804 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 1393445376 is about 37328.8812583501. The cubic root of 1393445376 is about 1116.9403566860.

The spelling of 1393445376 in words is "one billion, three hundred ninety-three million, four hundred forty-five thousand, three hundred seventy-six".