728338456 has 8 divisors (see below), whose sum is σ = 1365634620. Its totient is φ = 364169224.

The previous prime is 728338439. The next prime is 728338469. The reversal of 728338456 is 654833827.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45521146 + ... + 45521161.

Almost surely, 2^728338456 is an apocalyptic number.

It is an amenable number.

728338456 is a deficient number, since it is larger than the sum of its proper divisors (637296164).

728338456 is a wasteful number, since it uses less digits than its factorization.

728338456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91042313 (or 91042309 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 728338456 is about 26987.7464046185. The cubic root of 728338456 is about 899.7276772795.

The spelling of 728338456 in words is "seven hundred twenty-eight million, three hundred thirty-eight thousand, four hundred fifty-six".