9073728 has 112 divisors (see below), whose sum is σ = 27432000. Its totient is φ = 2939904.

The previous prime is 9073709. The next prime is 9073747. The reversal of 9073728 is 8273709.

It is an interprime number because it is at equal distance from previous prime (9073709) and next prime (9073747).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 9073692 and 9073701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101908 + ... + 101996.

Almost surely, 2^9073728 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 9073728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13716000).

9073728 is an abundant number, since it is smaller than the sum of its proper divisors (18358272).

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

9073728 is a wasteful number, since it uses less digits than its factorization.

9073728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 9073728 is about 3012.2629367305. The cubic root of 9073728 is about 208.5748398588.

It can be divided in two parts, 9073 and 728, that added together give a square (9801 = 99²).

The spelling of 9073728 in words is "nine million, seventy-three thousand, seven hundred twenty-eight".