1393334784 has 140 divisors (see below), whose sum is σ = 4175131026. Its totient is φ = 464320512.

The previous prime is 1393334777. The next prime is 1393334797. The reversal of 1393334784 is 4874333931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1164720384 + 228614400 = 34128^2 + 15120^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 371382 + ... + 375114.

Almost surely, 2^1393334784 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 1393334784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2087565513).

1393334784 is an abundant number, since it is smaller than the sum of its proper divisors (2781796242).

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

1393334784 is an frugal number, since it uses more digits than its factorization.

1393334784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769 (or 3738 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 1393334784 is about 37327.3999094499. The cubic root of 1393334784 is about 1116.9108069244.

The spelling of 1393334784 in words is "one billion, three hundred ninety-three million, three hundred thirty-four thousand, seven hundred eighty-four".