1381329860 has 24 divisors (see below), whose sum is σ = 3026915136. Its totient is φ = 528508640.

The previous prime is 1381329853. The next prime is 1381329863. The reversal of 1381329860 is 689231831.

It is not an unprimeable number, because it can be changed into a prime (1381329863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500986 + ... + 1501905.

It is an arithmetic number, because the mean of its divisors is an integer number (126121464).

Almost surely, 2^1381329860 is an apocalyptic number.

1381329860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381329860 is an abundant number, since it is smaller than the sum of its proper divisors (1645585276).

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

1381329860 is a wasteful number, since it uses less digits than its factorization.

1381329860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002923 (or 3002921 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1381329860 is about 37166.2462457537. The cubic root of 1381329860 is about 1113.6937950587.

The spelling of 1381329860 in words is "one billion, three hundred eighty-one million, three hundred twenty-nine thousand, eight hundred sixty".