1393446481 has 8 divisors (see below), whose sum is σ = 1599346944. Its totient is φ = 1189255200.

The previous prime is 1393446409. The next prime is 1393446487. The reversal of 1393446481 is 1846443931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1393446481 - 2¹¹ = 1393444433 is a prime.

It is a super-2 number, since 2×1393446481² = 3883386190822566722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393446487) 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, 425545 + ... + 428806.

It is an arithmetic number, because the mean of its divisors is an integer number (199918368).

Almost surely, 2^1393446481 is an apocalyptic number.

It is an amenable number.

1393446481 is a deficient number, since it is larger than the sum of its proper divisors (205900463).

1393446481 is an equidigital number, since it uses as much as digits as its factorization.

1393446481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854591.

The product of its digits is 248832, while the sum is 43.

The square root of 1393446481 is about 37328.8960592193. The cubic root of 1393446481 is about 1116.9406519299.

The spelling of 1393446481 in words is "one billion, three hundred ninety-three million, four hundred forty-six thousand, four hundred eighty-one".