1439999998 has 4 divisors (see below), whose sum is σ = 2160000000. Its totient is φ = 719999998.

The previous prime is 1439999947. The next prime is 1440000043. The reversal of 1439999998 is 8999999341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8999999341 = 83 ⋅108433727.

It is a super-4 number, since 4×1439999998⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359999998 + ... + 360000001.

It is an arithmetic number, because the mean of its divisors is an integer number (540000000).

Almost surely, 2^1439999998 is an apocalyptic number.

1439999998 is a deficient number, since it is larger than the sum of its proper divisors (720000002).

1439999998 is an equidigital number, since it uses as much as digits as its factorization.

1439999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720000001.

The product of its digits is 51018336, while the sum is 70.

The square root of 1439999998 is about 37947.3318956682. The cubic root of 1439999998 is about 1129.2432341344.

The spelling of 1439999998 in words is "one billion, four hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".