1388269140 has 24 divisors (see below), whose sum is σ = 3887153760. Its totient is φ = 370205088.

The previous prime is 1388269027. The next prime is 1388269151. The reversal of 1388269140 is 419628831.

It is a junction number, because it is equal to n+sod(n) for n = 1388269092 and 1388269101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11568850 + ... + 11568969.

It is an arithmetic number, because the mean of its divisors is an integer number (161964740).

Almost surely, 2^1388269140 is an apocalyptic number.

1388269140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388269140 is an abundant number, since it is smaller than the sum of its proper divisors (2498884620).

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

1388269140 is a wasteful number, since it uses less digits than its factorization.

1388269140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23137831 (or 23137829 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1388269140 is about 37259.4838933660. The cubic root of 1388269140 is about 1115.5556066497. Note that the first 3 decimals are identical.

The spelling of 1388269140 in words is "one billion, three hundred eighty-eight million, two hundred sixty-nine thousand, one hundred forty".