1328998 has 16 divisors (see below), whose sum is σ = 2192976. Its totient is φ = 599040.

The previous prime is 1328981. The next prime is 1329011. The reversal of 1328998 is 8998231.

It is a self number, because there is not a number n which added to its sum of digits gives 1328998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4090 + ... + 4402.

It is an arithmetic number, because the mean of its divisors is an integer number (137061).

2^1328998 is an apocalyptic number.

1328998 is a deficient number, since it is larger than the sum of its proper divisors (863978).

1328998 is a wasteful number, since it uses less digits than its factorization.

1328998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its digits is 31104, while the sum is 40.

The square root of 1328998 is about 1152.8217555199. The cubic root of 1328998 is about 109.9448208100.

The spelling of 1328998 in words is "one million, three hundred twenty-eight thousand, nine hundred ninety-eight".