728414172 has 36 divisors (see below), whose sum is σ = 1938179880. Its totient is φ = 230025312.

The previous prime is 728414149. The next prime is 728414189. The reversal of 728414172 is 271414827.

728414172 is a `hidden beast` number, since 72 + 8 + 414 + 172 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 531783 + ... + 533150.

It is an arithmetic number, because the mean of its divisors is an integer number (53838330).

Almost surely, 2^728414172 is an apocalyptic number.

It is an amenable number.

728414172 is an abundant number, since it is smaller than the sum of its proper divisors (1209765708).

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

728414172 is a wasteful number, since it uses less digits than its factorization.

728414172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064962 (or 1064957 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 728414172 is about 26989.1491529466. The cubic root of 728414172 is about 899.7588539116.

Adding to 728414172 its reverse (271414827), we get a palindrome (999828999).

The spelling of 728414172 in words is "seven hundred twenty-eight million, four hundred fourteen thousand, one hundred seventy-two".