1388312050 has 12 divisors (see below), whose sum is σ = 2582260506. Its totient is φ = 555324800.

The previous prime is 1388312047. The next prime is 1388312063. The reversal of 1388312050 is 502138831.

It can be written as a sum of positive squares in 3 ways, for example, as 829036849 + 559275201 = 28793^2 + 23649^2 .

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, 13883071 + ... + 13883170.

Almost surely, 2^1388312050 is an apocalyptic number.

1388312050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388312050 is a deficient number, since it is larger than the sum of its proper divisors (1193948456).

1388312050 is a wasteful number, since it uses less digits than its factorization.

1388312050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27766253 (or 27766248 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1388312050 is about 37260.0597154648. The cubic root of 1388312050 is about 1115.5671000978.

The spelling of 1388312050 in words is "one billion, three hundred eighty-eight million, three hundred twelve thousand, fifty".