2739728 has 10 divisors (see below), whose sum is σ = 5308254. Its totient is φ = 1369856.

The previous prime is 2739721. The next prime is 2739731. The reversal of 2739728 is 8279372.

It can be written as a sum of positive squares in only one way, i.e., 1763584 + 976144 = 1328^2 + 988^2 .

It is a super-2 number, since 2×2739728² = 15012219027968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2739691 and 2739700.

It is not an unprimeable number, because it can be changed into a prime (2739721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85601 + ... + 85632.

2^2739728 is an apocalyptic number.

It is an amenable number.

2739728 is a deficient number, since it is larger than the sum of its proper divisors (2568526).

2739728 is a wasteful number, since it uses less digits than its factorization.

2739728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171241 (or 171235 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 2739728 is about 1655.2123730809. The cubic root of 2739728 is about 139.9273092028.

It can be divided in two parts, 273 and 9728, that added together give a palindrome (10001).

The spelling of 2739728 in words is "two million, seven hundred thirty-nine thousand, seven hundred twenty-eight".