755728 has 20 divisors (see below), whose sum is σ = 1478700. Its totient is φ = 374144.

The previous prime is 755719. The next prime is 755737. The reversal of 755728 is 827557.

It is an interprime number because it is at equal distance from previous prime (755719) and next prime (755737).

It can be written as a sum of positive squares in 2 ways, for example, as 63504 + 692224 = 252^2 + 832^2 .

It is a super-2 number, since 2×755728² = 1142249619968, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 755693 and 755702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2226 + ... + 2542.

It is an arithmetic number, because the mean of its divisors is an integer number (73935).

2⁷⁵⁵⁷²⁸ is an apocalyptic number.

It is an amenable number.

755728 is a deficient number, since it is larger than the sum of its proper divisors (722972).

755728 is a wasteful number, since it uses less digits than its factorization.

755728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 468 counting only the distinct ones).

The product of its digits is 19600, while the sum is 34.

The square root of 755728 is about 869.3261758397. The cubic root of 755728 is about 91.0867425521.

The spelling of 755728 in words is "seven hundred fifty-five thousand, seven hundred twenty-eight".