1381312032 has 24 divisors (see below), whose sum is σ = 3625944336. Its totient is φ = 460437312.

The previous prime is 1381312007. The next prime is 1381312061. The reversal of 1381312032 is 2302131831.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1381311993 and 1381312011.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 7194238 + ... + 7194429.

It is an arithmetic number, because the mean of its divisors is an integer number (151081014).

Almost surely, 2^1381312032 is an apocalyptic number.

1381312032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381312032 is an abundant number, since it is smaller than the sum of its proper divisors (2244632304).

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

1381312032 is a wasteful number, since it uses less digits than its factorization.

1381312032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14388680 (or 14388672 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1381312032 is about 37166.0064037018. The cubic root of 1381312032 is about 1113.6890037777.

Adding to 1381312032 its reverse (2302131831), we get a palindrome (3683443863).

The spelling of 1381312032 in words is "one billion, three hundred eighty-one million, three hundred twelve thousand, thirty-two".