1393040304 has 120 divisors (see below), whose sum is σ = 4041245312. Its totient is φ = 447482880.

The previous prime is 1393040291. The next prime is 1393040321. The reversal of 1393040304 is 4030403931.

It is a super-2 number, since 2×1393040304² = 3881122577136824832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1396734 + ... + 1397730.

Almost surely, 2^1393040304 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 1393040304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020622656).

1393040304 is an abundant number, since it is smaller than the sum of its proper divisors (2648205008).

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

1393040304 is a wasteful number, since it uses less digits than its factorization.

1393040304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 1393040304 is about 37323.4551455248. The cubic root of 1393040304 is about 1116.8321153631.

The spelling of 1393040304 in words is "one billion, three hundred ninety-three million, forty thousand, three hundred four".