7973728 has 24 divisors (see below), whose sum is σ = 17941392. Its totient is φ = 3417216.

The previous prime is 7973723. The next prime is 7973741. The reversal of 7973728 is 8273797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7973723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17575 + ... + 18022.

It is an arithmetic number, because the mean of its divisors is an integer number (747558).

Almost surely, 2^7973728 is an apocalyptic number.

It is an amenable number.

7973728 is an abundant number, since it is smaller than the sum of its proper divisors (9967664).

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

7973728 is a wasteful number, since it uses less digits than its factorization.

7973728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35614 (or 35606 counting only the distinct ones).

The product of its digits is 148176, while the sum is 43.

The square root of 7973728 is about 2823.7790281819. The cubic root of 7973728 is about 199.7808265694.

The spelling of 7973728 in words is "seven million, nine hundred seventy-three thousand, seven hundred twenty-eight".