1398259968 has 144 divisors (see below), whose sum is σ = 4277683200. Its totient is φ = 397191168.

The previous prime is 1398259963. The next prime is 1398259997. The reversal of 1398259968 is 8699528931.

It is a happy number.

It is a super-2 number, since 2×1398259968² = 3910261876222722048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1398259963) 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, 1069171 + ... + 1070477.

Almost surely, 2^1398259968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1398259968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138841600).

1398259968 is an abundant number, since it is smaller than the sum of its proper divisors (2879423232).

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

1398259968 is a wasteful number, since it uses less digits than its factorization.

1398259968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1518 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 60.

The square root of 1398259968 is about 37393.3144826719. The cubic root of 1398259968 is about 1118.2252845673.

The spelling of 1398259968 in words is "one billion, three hundred ninety-eight million, two hundred fifty-nine thousand, nine hundred sixty-eight".