42804640728 has 64 divisors (see below), whose sum is σ = 124071436800. Its totient is φ = 13647854880.

The previous prime is 42804640699. The next prime is 42804640733. The reversal of 42804640728 is 82704640824.

42804640728 is a `hidden beast` number, since 42 + 80 + 464 + 0 + 72 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4303068 + ... + 4313003.

It is an arithmetic number, because the mean of its divisors is an integer number (1938616200).

Almost surely, 2^42804640728 is an apocalyptic number.

It is an amenable number.

42804640728 is an abundant number, since it is smaller than the sum of its proper divisors (81266796072).

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

42804640728 is a wasteful number, since it uses less digits than its factorization.

42804640728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8616109 (or 8616099 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The spelling of 42804640728 in words is "forty-two billion, eight hundred four million, six hundred forty thousand, seven hundred twenty-eight".