1398851328 has 144 divisors (see below), whose sum is σ = 4272450560. Its totient is φ = 398020608.

The previous prime is 1398851299. The next prime is 1398851357. The reversal of 1398851328 is 8231588931.

It is an interprime number because it is at equal distance from previous prime (1398851299) and next prime (1398851357).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1972638 + ... + 1973346.

Almost surely, 2^1398851328 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 1398851328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136225280).

1398851328 is an abundant number, since it is smaller than the sum of its proper divisors (2873599232).

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

1398851328 is an equidigital number, since it uses as much as digits as its factorization.

1398851328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102 (or 1088 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 1398851328 is about 37401.2209426377. The cubic root of 1398851328 is about 1118.3829043991.

The spelling of 1398851328 in words is "one billion, three hundred ninety-eight million, eight hundred fifty-one thousand, three hundred twenty-eight".