1388045503 has 12 divisors (see below), whose sum is σ = 1514027808. Its totient is φ = 1271899200.

The previous prime is 1388045467. The next prime is 1388045537. The reversal of 1388045503 is 3055408831.

It is not a de Polignac number, because 1388045503 - 2²⁹ = 851174591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388045543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6823 + ... + 53128.

It is an arithmetic number, because the mean of its divisors is an integer number (126168984).

Almost surely, 2^1388045503 is an apocalyptic number.

1388045503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1388045503 is a deficient number, since it is larger than the sum of its proper divisors (125982305).

1388045503 is a wasteful number, since it uses less digits than its factorization.

1388045503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60114 (or 60101 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 1388045503 is about 37256.4826976461. The cubic root of 1388045503 is about 1115.4957016213.

The spelling of 1388045503 in words is "one billion, three hundred eighty-eight million, forty-five thousand, five hundred three".