1328998374 has 128 divisors (see below), whose sum is σ = 3402777600. Its totient is φ = 380540160.

The previous prime is 1328998357. The next prime is 1328998379. The reversal of 1328998374 is 4738998231.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1328998374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328998379) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1215372 + ... + 1216464.

It is an arithmetic number, because the mean of its divisors is an integer number (26584200).

Almost surely, 2^1328998374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1328998374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701388800).

1328998374 is an abundant number, since it is smaller than the sum of its proper divisors (2073779226).

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

1328998374 is a wasteful number, since it uses less digits than its factorization.

1328998374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1221 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 1328998374 is about 36455.4299659187. The cubic root of 1328998374 is about 1099.4483112337.

The spelling of 1328998374 in words is "one billion, three hundred twenty-eight million, nine hundred ninety-eight thousand, three hundred seventy-four".