1388338632 has 24 divisors (see below), whose sum is σ = 3760083990. Its totient is φ = 462779520.

The previous prime is 1388338603. The next prime is 1388338661. The reversal of 1388338632 is 2368338831.

1388338632 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 3 + 3 + 8 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (1388338603) and next prime (1388338661).

It can be written as a sum of positive squares in only one way, i.e., 706815396 + 681523236 = 26586^2 + 26106^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9641169 + ... + 9641312.

Almost surely, 2^1388338632 is an apocalyptic number.

1388338632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1388338632 is an abundant number, since it is smaller than the sum of its proper divisors (2371745358).

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

1388338632 is a wasteful number, since it uses less digits than its factorization.

1388338632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19282493 (or 19282486 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 1388338632 is about 37260.4164227938. The cubic root of 1388338632 is about 1115.5742199705.

The spelling of 1388338632 in words is "one billion, three hundred eighty-eight million, three hundred thirty-eight thousand, six hundred thirty-two".