1393734664 has 128 divisors (see below), whose sum is σ = 3444768000. Its totient is φ = 514031616.

The previous prime is 1393734659. The next prime is 1393734677. The reversal of 1393734664 is 4664373931.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 523224 + ... + 525880.

It is an arithmetic number, because the mean of its divisors is an integer number (26912250).

Almost surely, 2^1393734664 is an apocalyptic number.

1393734664 is a gapful number since it is divisible by the number (14) 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 1393734664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722384000).

1393734664 is an abundant number, since it is smaller than the sum of its proper divisors (2051033336).

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

1393734664 is a wasteful number, since it uses less digits than its factorization.

1393734664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735 (or 2731 counting only the distinct ones).

The product of its digits is 979776, while the sum is 46.

The square root of 1393734664 is about 37332.7559122013. The cubic root of 1393734664 is about 1117.0176459456.

The spelling of 1393734664 in words is "one billion, three hundred ninety-three million, seven hundred thirty-four thousand, six hundred sixty-four".