298666728 has 48 divisors (see below), whose sum is σ = 813118020. Its totient is φ = 99035136.

The previous prime is 298666723. The next prime is 298666733. The reversal of 298666728 is 827666892.

It is an interprime number because it is at equal distance from previous prime (298666723) and next prime (298666733).

It can be written as a sum of positive squares in 2 ways, for example, as 257987844 + 40678884 = 16062^2 + 6378^2 .

It is a super-3 number, since 3×298666728³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (298666723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3150 + ... + 24642.

Almost surely, 2^298666728 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 298666728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406559010).

298666728 is an abundant number, since it is smaller than the sum of its proper divisors (514451292).

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

298666728 is a wasteful number, since it uses less digits than its factorization.

298666728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21698 (or 21691 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 298666728 is about 17281.9769702427. The cubic root of 298666728 is about 668.4397704182.

The spelling of 298666728 in words is "two hundred ninety-eight million, six hundred sixty-six thousand, seven hundred twenty-eight".