1398481329 has 16 divisors (see below), whose sum is σ = 2133843840. Its totient is φ = 798072960.

The previous prime is 1398481327. The next prime is 1398481411. The reversal of 1398481329 is 9231848931.

It is not a de Polignac number, because 1398481329 - 2¹ = 1398481327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398481327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27774 + ... + 59735.

It is an arithmetic number, because the mean of its divisors is an integer number (133365240).

Almost surely, 2^1398481329 is an apocalyptic number.

It is an amenable number.

1398481329 is a deficient number, since it is larger than the sum of its proper divisors (735362511).

1398481329 is an equidigital number, since it uses as much as digits as its factorization.

1398481329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88280.

The product of its digits is 373248, while the sum is 48.

The square root of 1398481329 is about 37396.2742662956. The cubic root of 1398481329 is about 1118.2842908589.

The spelling of 1398481329 in words is "one billion, three hundred ninety-eight million, four hundred eighty-one thousand, three hundred twenty-nine".