728461755 has 96 divisors (see below), whose sum is σ = 1513634304. Its totient is φ = 329204736.

The previous prime is 728461751. The next prime is 728461837. The reversal of 728461755 is 557164827.

728461755 is a `hidden beast` number, since 7 + 28 + 4 + 617 + 5 + 5 = 666.

It is not a de Polignac number, because 728461755 - 2² = 728461751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 728461755.

It is not an unprimeable number, because it can be changed into a prime (728461751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 824544 + ... + 825426.

It is an arithmetic number, because the mean of its divisors is an integer number (15767024).

Almost surely, 2^728461755 is an apocalyptic number.

728461755 is an abundant number, since it is smaller than the sum of its proper divisors (785172549).

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

728461755 is an equidigital number, since it uses as much as digits as its factorization.

728461755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 995 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 728461755 is about 26990.0306594861. The cubic root of 728461755 is about 899.7784454640.

The spelling of 728461755 in words is "seven hundred twenty-eight million, four hundred sixty-one thousand, seven hundred fifty-five".