1388500085 has 24 divisors (see below), whose sum is σ = 1945714560. Its totient is φ = 931804704.

The previous prime is 1388500079. The next prime is 1388500153. The reversal of 1388500085 is 5800058831.

It is not a de Polignac number, because 1388500085 - 2⁸ = 1388499829 is a prime.

It is a congruent number.

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, 68336 + ... + 86294.

It is an arithmetic number, because the mean of its divisors is an integer number (81071440).

Almost surely, 2^1388500085 is an apocalyptic number.

It is an amenable number.

1388500085 is a deficient number, since it is larger than the sum of its proper divisors (557214475).

1388500085 is an equidigital number, since it uses as much as digits as its factorization.

1388500085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18065 (or 18018 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 1388500085 is about 37262.5829083278. The cubic root of 1388500085 is about 1115.6174625001.

The spelling of 1388500085 in words is "one billion, three hundred eighty-eight million, five hundred thousand, eighty-five".