7423728 has 40 divisors (see below), whose sum is σ = 20654928. Its totient is φ = 2284032.

The previous prime is 7423727. The next prime is 7423751. The reversal of 7423728 is 8273247.

It is a super-2 number, since 2×7423728² = 110223474835968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7423723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5325 + ... + 6572.

Almost surely, 2^7423728 is an apocalyptic number.

7423728 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

7423728 is an abundant number, since it is smaller than the sum of its proper divisors (13231200).

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

7423728 is a wasteful number, since it uses less digits than its factorization.

7423728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11921 (or 11915 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 7423728 is about 2724.6519043724. The cubic root of 7423728 is about 195.0775759718.

The spelling of 7423728 in words is "seven million, four hundred twenty-three thousand, seven hundred twenty-eight".