1388740336 has 40 divisors (see below), whose sum is σ = 2881020960. Its totient is φ = 646170624.

The previous prime is 1388740321. The next prime is 1388740357. The reversal of 1388740336 is 6330478831.

It is a junction number, because it is equal to n+sod(n) for n = 1388740292 and 1388740301.

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, 4476 + ... + 52891.

It is an arithmetic number, because the mean of its divisors is an integer number (72025524).

Almost surely, 2^1388740336 is an apocalyptic number.

1388740336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1388740336 is an abundant number, since it is smaller than the sum of its proper divisors (1492280624).

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

1388740336 is a wasteful number, since it uses less digits than its factorization.

1388740336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57481 (or 57475 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 1388740336 is about 37265.8065255537. The cubic root of 1388740336 is about 1115.6818035725.

The spelling of 1388740336 in words is "one billion, three hundred eighty-eight million, seven hundred forty thousand, three hundred thirty-six".