1388340832 has 12 divisors (see below), whose sum is σ = 2733296076. Its totient is φ = 694170400.

The previous prime is 1388340817. The next prime is 1388340839. The reversal of 1388340832 is 2380438831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388340839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21692794 + ... + 21692857.

It is an arithmetic number, because the mean of its divisors is an integer number (227774673).

Almost surely, 2^1388340832 is an apocalyptic number.

It is an amenable number.

1388340832 is a deficient number, since it is larger than the sum of its proper divisors (1344955244).

1388340832 is an equidigital number, since it uses as much as digits as its factorization.

1388340832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43385661 (or 43385653 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 1388340832 is about 37260.4459447280. The cubic root of 1388340832 is about 1115.5748092269.

The spelling of 1388340832 in words is "one billion, three hundred eighty-eight million, three hundred forty thousand, eight hundred thirty-two".