7390728 has 48 divisors (see below), whose sum is σ = 20891520. Its totient is φ = 2355936.

The previous prime is 7390723. The next prime is 7390729. The reversal of 7390728 is 8270937.

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 = 7390692 and 7390701.

It is not an unprimeable number, because it can be changed into a prime (7390723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576 + ... + 3887.

It is an arithmetic number, because the mean of its divisors is an integer number (435240).

Almost surely, 2^7390728 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 7390728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10445760).

7390728 is an abundant number, since it is smaller than the sum of its proper divisors (13500792).

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

7390728 is a wasteful number, since it uses less digits than its factorization.

7390728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498 (or 4491 counting only the distinct ones).

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

The square root of 7390728 is about 2718.5893400806. The cubic root of 7390728 is about 194.7880932755.

It can be divided in two parts, 7390 and 728, that added together give a palindrome (8118).

The spelling of 7390728 in words is "seven million, three hundred ninety thousand, seven hundred twenty-eight".