78330057828 has 24 divisors (see below), whose sum is σ = 199385602080. Its totient is φ = 23736381120.

The previous prime is 78330057811. The next prime is 78330057881. The reversal of 78330057828 is 82875003387.

It is a super-2 number, since 2×78330057828² (a number of 23 digits) contains 22 as substring.

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, 296704633 + ... + 296704896.

It is an arithmetic number, because the mean of its divisors is an integer number (8307733420).

Almost surely, 2^78330057828 is an apocalyptic number.

It is an amenable number.

78330057828 is an abundant number, since it is smaller than the sum of its proper divisors (121055544252).

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

78330057828 is a wasteful number, since it uses less digits than its factorization.

78330057828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593409547 (or 593409545 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 78330057828 in words is "seventy-eight billion, three hundred thirty million, fifty-seven thousand, eight hundred twenty-eight".