457666728 has 16 divisors (see below), whose sum is σ = 1144166880. Its totient is φ = 152555568.

The previous prime is 457666681. The next prime is 457666739. The reversal of 457666728 is 827666754.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9534700 + ... + 9534747.

It is an arithmetic number, because the mean of its divisors is an integer number (71510430).

Almost surely, 2^457666728 is an apocalyptic number.

It is an amenable number.

457666728 is an abundant number, since it is smaller than the sum of its proper divisors (686500152).

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

457666728 is a wasteful number, since it uses less digits than its factorization.

457666728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19069456 (or 19069452 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 51.

The square root of 457666728 is about 21393.1467531076. The cubic root of 457666728 is about 770.6368644595.

The spelling of 457666728 in words is "four hundred fifty-seven million, six hundred sixty-six thousand, seven hundred twenty-eight".