1390730244 has 12 divisors (see below), whose sum is σ = 3245037264. Its totient is φ = 463576744.

The previous prime is 1390730183. The next prime is 1390730249. The reversal of 1390730244 is 4420370931.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1390730244² = 3868261223152599072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1390730249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57947082 + ... + 57947105.

It is an arithmetic number, because the mean of its divisors is an integer number (270419772).

Almost surely, 2^1390730244 is an apocalyptic number.

It is an amenable number.

1390730244 is an abundant number, since it is smaller than the sum of its proper divisors (1854307020).

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

1390730244 is a wasteful number, since it uses less digits than its factorization.

1390730244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115894194 (or 115894192 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 1390730244 is about 37292.4958135011. The cubic root of 1390730244 is about 1116.2144312462.

The spelling of 1390730244 in words is "one billion, three hundred ninety million, seven hundred thirty thousand, two hundred forty-four".