728998 has 4 divisors (see below), whose sum is σ = 1093500. Its totient is φ = 364498.

The previous prime is 728993. The next prime is 729019. The reversal of 728998 is 899827.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728993) by changing a digit.

728998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182248 + ... + 182251.

It is an arithmetic number, because the mean of its divisors is an integer number (273375).

2⁷²⁸⁹⁹⁸ is an apocalyptic number.

728998 is a deficient number, since it is larger than the sum of its proper divisors (364502).

728998 is a wasteful number, since it uses less digits than its factorization.

728998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364501.

The product of its digits is 72576, while the sum is 43.

The square root of 728998 is about 853.8137970307. The cubic root of 728998 is about 89.9999176954. Note that the first 4 decimals are identical.

The spelling of 728998 in words is "seven hundred twenty-eight thousand, nine hundred ninety-eight".