7274728 has 8 divisors (see below), whose sum is σ = 13640130. Its totient is φ = 3637360.

The previous prime is 7274719. The next prime is 7274767. The reversal of 7274728 is 8274727.

It can be written as a sum of positive squares in only one way, i.e., 7064964 + 209764 = 2658^2 + 458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454663 + ... + 454678.

Almost surely, 2^7274728 is an apocalyptic number.

It is an amenable number.

7274728 is a deficient number, since it is larger than the sum of its proper divisors (6365402).

7274728 is a wasteful number, since it uses less digits than its factorization.

7274728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909347 (or 909343 counting only the distinct ones).

The product of its digits is 43904, while the sum is 37.

The square root of 7274728 is about 2697.1703691091. The cubic root of 7274728 is about 193.7636260968.

Subtracting 7274728 from its reverse (8274727), we obtain a palindrome (999999).

The spelling of 7274728 in words is "seven million, two hundred seventy-four thousand, seven hundred twenty-eight".