9028728 has 24 divisors (see below), whose sum is σ = 24453000. Its totient is φ = 3009552.

The previous prime is 9028699. The next prime is 9028741. The reversal of 9028728 is 8278209.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9028692 and 9028701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62628 + ... + 62771.

It is an arithmetic number, because the mean of its divisors is an integer number (1018875).

Almost surely, 2^9028728 is an apocalyptic number.

It is an amenable number.

9028728 is an abundant number, since it is smaller than the sum of its proper divisors (15424272).

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

9028728 is a wasteful number, since it uses less digits than its factorization.

9028728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125411 (or 125404 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 9028728 is about 3004.7841852619. The cubic root of 9028728 is about 208.2294681552.

The spelling of 9028728 in words is "nine million, twenty-eight thousand, seven hundred twenty-eight".