1393749306 has 12 divisors (see below), whose sum is σ = 3019790202. Its totient is φ = 464583096.

The previous prime is 1393749277. The next prime is 1393749349. The reversal of 1393749306 is 6039473931.

It is a happy number.

1393749306 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1230957225 + 162792081 = 35085^2 + 12759^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38715241 + ... + 38715276.

Almost surely, 2^1393749306 is an apocalyptic number.

1393749306 is an abundant number, since it is smaller than the sum of its proper divisors (1626040896).

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

1393749306 is a wasteful number, since it uses less digits than its factorization.

1393749306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77430525 (or 77430522 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 1393749306 is about 37332.9520129336. The cubic root of 1393749306 is about 1117.0215575737.

The spelling of 1393749306 in words is "one billion, three hundred ninety-three million, seven hundred forty-nine thousand, three hundred six".