1388887623 has 12 divisors (see below), whose sum is σ = 2008523088. Its totient is φ = 924839520.

The previous prime is 1388887609. The next prime is 1388887649. The reversal of 1388887623 is 3267888831.

1388887623 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 8 + 8 + 7 + 623 = 666.

1388887623 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1388887623 - 2⁶ = 1388887559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1388887623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388887723) 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, 82323 + ... + 97748.

It is an arithmetic number, because the mean of its divisors is an integer number (167376924).

Almost surely, 2^1388887623 is an apocalyptic number.

1388887623 is a deficient number, since it is larger than the sum of its proper divisors (619635465).

1388887623 is a wasteful number, since it uses less digits than its factorization.

1388887623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180934 (or 180931 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 1388887623 is about 37267.7826413110. The cubic root of 1388887623 is about 1115.7212444991.

The spelling of 1388887623 in words is "one billion, three hundred eighty-eight million, eight hundred eighty-seven thousand, six hundred twenty-three".