7504728 has 128 divisors (see below), whose sum is σ = 24330240. Its totient is φ = 1872000.

The previous prime is 7504727. The next prime is 7504729. The reversal of 7504728 is 8274057.

7504728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7504727) and next prime (7504729).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7504727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57223 + ... + 57353.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

Almost surely, 2^7504728 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 7504728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12165120).

7504728 is an abundant number, since it is smaller than the sum of its proper divisors (16825512).

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

7504728 is a wasteful number, since it uses less digits than its factorization.

7504728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 7504728 is about 2739.4758622773. The cubic root of 7504728 is about 195.7845056276.

The spelling of 7504728 in words is "seven million, five hundred four thousand, seven hundred twenty-eight".