78298390828 has 24 divisors (see below), whose sum is σ = 156619153152. Its totient is φ = 33551659344.

The previous prime is 78298390801. The next prime is 78298390853. The reversal of 78298390828 is 82809389287.

It is a super-2 number, since 2×78298390828² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78298390828.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3375 + ... + 395737.

It is an arithmetic number, because the mean of its divisors is an integer number (6525798048).

Almost surely, 2^78298390828 is an apocalyptic number.

It is an amenable number.

78298390828 is an abundant number, since it is smaller than the sum of its proper divisors (78320762324).

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

78298390828 is a wasteful number, since it uses less digits than its factorization.

78298390828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399501 (or 399499 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 78298390828 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, eight hundred twenty-eight".