1388457005 has 32 divisors (see below), whose sum is σ = 1887889248. Its totient is φ = 973209600.

The previous prime is 1388456987. The next prime is 1388457011. The reversal of 1388457005 is 5007548831.

It can be written as a sum of positive squares in 16 ways, for example, as 358496356 + 1029960649 = 18934^2 + 32093^2 .

It is not a de Polignac number, because 1388457005 - 2¹² = 1388452909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 91565 + ... + 105645.

It is an arithmetic number, because the mean of its divisors is an integer number (58996539).

Almost surely, 2^1388457005 is an apocalyptic number.

It is an amenable number.

1388457005 is a deficient number, since it is larger than the sum of its proper divisors (499432243).

1388457005 is a wasteful number, since it uses less digits than its factorization.

1388457005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 1388457005 is about 37262.0048440768. The cubic root of 1388457005 is about 1115.6059245588.

The spelling of 1388457005 in words is "one billion, three hundred eighty-eight million, four hundred fifty-seven thousand, five".