1388479108 has 12 divisors (see below), whose sum is σ = 2447575452. Its totient is φ = 689171840.

The previous prime is 1388479051. The next prime is 1388479129. The reversal of 1388479108 is 8019748831.

It can be written as a sum of positive squares in 2 ways, for example, as 258309184 + 1130169924 = 16072^2 + 33618^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266313 + ... + 1267408.

It is an arithmetic number, because the mean of its divisors is an integer number (203964621).

Almost surely, 2^1388479108 is an apocalyptic number.

It is an amenable number.

1388479108 is a deficient number, since it is larger than the sum of its proper divisors (1059096344).

1388479108 is a wasteful number, since it uses less digits than its factorization.

1388479108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533862 (or 2533860 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 1388479108 is about 37262.3014318762. The cubic root of 1388479108 is about 1115.6118443453.

The spelling of 1388479108 in words is "one billion, three hundred eighty-eight million, four hundred seventy-nine thousand, one hundred eight".