988728 has 32 divisors (see below), whose sum is σ = 2662800. Its totient is φ = 304128.

The previous prime is 988727. The next prime is 988733. The reversal of 988728 is 827889.

It is a happy number.

988728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 988728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273 + ... + 1896.

2⁹⁸⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

988728 is an abundant number, since it is smaller than the sum of its proper divisors (1674072).

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

988728 is a wasteful number, since it uses less digits than its factorization.

988728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191 (or 3187 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 988728 is about 994.3480276040. The cubic root of 988728 is about 99.6228460036.

The spelling of 988728 in words is "nine hundred eighty-eight thousand, seven hundred twenty-eight".