728251606 has 8 divisors (see below), whose sum is σ = 1092612240. Its totient is φ = 364047528.

The previous prime is 728251603. The next prime is 728251619. The reversal of 728251606 is 606152827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728251603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26721 + ... + 46588.

It is an arithmetic number, because the mean of its divisors is an integer number (136576530).

Almost surely, 2^728251606 is an apocalyptic number.

728251606 is a deficient number, since it is larger than the sum of its proper divisors (364360634).

728251606 is a wasteful number, since it uses less digits than its factorization.

728251606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78278.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 728251606 is about 26986.1372930622. The cubic root of 728251606 is about 899.6919134784.

The spelling of 728251606 in words is "seven hundred twenty-eight million, two hundred fifty-one thousand, six hundred six".