4155728 has 10 divisors (see below), whose sum is σ = 8051754. Its totient is φ = 2077856.

The previous prime is 4155721. The next prime is 4155731. The reversal of 4155728 is 8275514.

It can be written as a sum of positive squares in only one way, i.e., 4048144 + 107584 = 2012^2 + 328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4155694 and 4155703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4155721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129851 + ... + 129882.

Almost surely, 2^4155728 is an apocalyptic number.

It is an amenable number.

4155728 is a deficient number, since it is larger than the sum of its proper divisors (3896026).

4155728 is a wasteful number, since it uses less digits than its factorization.

4155728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259741 (or 259735 counting only the distinct ones).

The product of its digits is 11200, while the sum is 32.

The square root of 4155728 is about 2038.5602762734. The cubic root of 4155728 is about 160.7739584735.

The spelling of 4155728 in words is "four million, one hundred fifty-five thousand, seven hundred twenty-eight".