1338640312 has 8 divisors (see below), whose sum is σ = 2509950600. Its totient is φ = 669320152.

The previous prime is 1338640297. The next prime is 1338640349. The reversal of 1338640312 is 2130468331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1338640312² = 3583915769822914688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83665012 + ... + 83665027.

It is an arithmetic number, because the mean of its divisors is an integer number (313743825).

Almost surely, 2^1338640312 is an apocalyptic number.

It is an amenable number.

1338640312 is a deficient number, since it is larger than the sum of its proper divisors (1171310288).

1338640312 is a wasteful number, since it uses less digits than its factorization.

1338640312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167330045 (or 167330041 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1338640312 is about 36587.4337990518. The cubic root of 1338640312 is about 1102.1007546193.

The spelling of 1338640312 in words is "one billion, three hundred thirty-eight million, six hundred forty thousand, three hundred twelve".