28077499968 has 112 divisors (see below), whose sum is σ = 85976033280. Its totient is φ = 7920566784.

The previous prime is 28077499867. The next prime is 28077499969. The reversal of 28077499968 is 86999477082.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (28077499969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26046 + ... + 238397.

Almost surely, 2^28077499968 is an apocalyptic number.

28077499968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28077499968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42988016640).

28077499968 is an abundant number, since it is smaller than the sum of its proper divisors (57898533312).

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

28077499968 is a wasteful number, since it uses less digits than its factorization.

28077499968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264544 (or 264534 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 69.

The spelling of 28077499968 in words is "twenty-eight billion, seventy-seven million, four hundred ninety-nine thousand, nine hundred sixty-eight".