7545728 has 32 divisors (see below), whose sum is σ = 15165360. Its totient is φ = 3739648.

The previous prime is 7545697. The next prime is 7545737. The reversal of 7545728 is 8275457.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×7545728² = 113876022099968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7545691 and 7545700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21200 + ... + 21552.

Almost surely, 2^7545728 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 7545728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7582680).

7545728 is an abundant number, since it is smaller than the sum of its proper divisors (7619632).

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

7545728 is a wasteful number, since it uses less digits than its factorization.

7545728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 522 counting only the distinct ones).

The product of its digits is 78400, while the sum is 38.

The square root of 7545728 is about 2746.9488528183. The cubic root of 7545728 is about 196.1403964240.

The spelling of 7545728 in words is "seven million, five hundred forty-five thousand, seven hundred twenty-eight".