7453728 has 48 divisors (see below), whose sum is σ = 21742560. Its totient is φ = 2484288.

The previous prime is 7453723. The next prime is 7453753. The reversal of 7453728 is 8273547.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×7453728² = 111116122195968, which contains 22 as substring.

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 = 7453692 and 7453701.

It is not an unprimeable number, because it can be changed into a prime (7453723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3450 + ... + 5177.

It is an arithmetic number, because the mean of its divisors is an integer number (452970).

Almost surely, 2^7453728 is an apocalyptic number.

It is an amenable number.

7453728 is an abundant number, since it is smaller than the sum of its proper divisors (14288832).

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

7453728 is a wasteful number, since it uses less digits than its factorization.

7453728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8646 (or 8632 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 7453728 is about 2730.1516441399. The cubic root of 7453728 is about 195.3399985560.

The spelling of 7453728 in words is "seven million, four hundred fifty-three thousand, seven hundred twenty-eight".