1398243439 has 16 divisors (see below), whose sum is σ = 1515153600. Its totient is φ = 1286365696.

The previous prime is 1398243401. The next prime is 1398243461. The reversal of 1398243439 is 9343428931.

It is a cyclic number.

It is not a de Polignac number, because 1398243439 - 2¹⁷ = 1398112367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398243479) 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, 175527 + ... + 183319.

It is an arithmetic number, because the mean of its divisors is an integer number (94697100).

Almost surely, 2^1398243439 is an apocalyptic number.

1398243439 is a deficient number, since it is larger than the sum of its proper divisors (116910161).

1398243439 is a wasteful number, since it uses less digits than its factorization.

1398243439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114.

The product of its digits is 559872, while the sum is 46.

The square root of 1398243439 is about 37393.0934665748. The cubic root of 1398243439 is about 1118.2208783246.

The spelling of 1398243439 in words is "one billion, three hundred ninety-eight million, two hundred forty-three thousand, four hundred thirty-nine".