7428736 has 32 divisors (see below), whose sum is σ = 16915680. Its totient is φ = 3183360.

The previous prime is 7428731. The next prime is 7428737. The reversal of 7428736 is 6378247.

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

It is a super-2 number, since 2×7428736² = 110372237115392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7428695 and 7428704.

It is not an unprimeable number, because it can be changed into a prime (7428731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250 + ... + 5041.

It is an arithmetic number, because the mean of its divisors is an integer number (528615).

Almost surely, 2^7428736 is an apocalyptic number.

It is an amenable number.

7428736 is an abundant number, since it is smaller than the sum of its proper divisors (9486944).

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

7428736 is an equidigital number, since it uses as much as digits as its factorization.

7428736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8312 (or 8300 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 7428736 is about 2725.5707659131. The cubic root of 7428736 is about 195.1214321450.

The spelling of 7428736 in words is "seven million, four hundred twenty-eight thousand, seven hundred thirty-six".