728421846 has 16 divisors (see below), whose sum is σ = 1457284608. Its totient is φ = 242733800.

The previous prime is 728421823. The next prime is 728421853. The reversal of 728421846 is 648124827.

It is a junction number, because it is equal to n+sod(n) for n = 728421798 and 728421807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5491 + ... + 38561.

It is an arithmetic number, because the mean of its divisors is an integer number (91080288).

Almost surely, 2^728421846 is an apocalyptic number.

728421846 is an abundant number, since it is smaller than the sum of its proper divisors (728862762).

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

728421846 is a wasteful number, since it uses less digits than its factorization.

728421846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36747.

The product of its digits is 172032, while the sum is 42.

The square root of 728421846 is about 26989.2913208183. The cubic root of 728421846 is about 899.7620136182.

The spelling of 728421846 in words is "seven hundred twenty-eight million, four hundred twenty-one thousand, eight hundred forty-six".