1386139888 has 20 divisors (see below), whose sum is σ = 3069310000. Its totient is φ = 594059904.

The previous prime is 1386139817. The next prime is 1386139891. The reversal of 1386139888 is 8889316831.

It is a congruent number.

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, 6188013 + ... + 6188236.

It is an arithmetic number, because the mean of its divisors is an integer number (153465500).

Almost surely, 2^1386139888 is an apocalyptic number.

It is an amenable number.

1386139888 is an abundant number, since it is smaller than the sum of its proper divisors (1683170112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1386139888 is a wasteful number, since it uses less digits than its factorization.

1386139888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12376264 (or 12376258 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 55.

The square root of 1386139888 is about 37230.8996399496. The cubic root of 1386139888 is about 1114.9849885704.

The spelling of 1386139888 in words is "one billion, three hundred eighty-six million, one hundred thirty-nine thousand, eight hundred eighty-eight".