28891202994 has 24 divisors (see below), whose sum is σ = 62873375760. Its totient is φ = 9587974968.

The previous prime is 28891202987. The next prime is 28891203023. The reversal of 28891202994 is 49920219882.

It is a super-2 number, since 2×28891202994² (a number of 22 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 28891202994.

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 11 ways as a sum of consecutive naturals, for example, 3531304 + ... + 3539475.

It is an arithmetic number, because the mean of its divisors is an integer number (2619723990).

Almost surely, 2^28891202994 is an apocalyptic number.

28891202994 is an abundant number, since it is smaller than the sum of its proper divisors (33982172766).

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

28891202994 is a wasteful number, since it uses less digits than its factorization.

28891202994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7071014 (or 7071011 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 28891202994 in words is "twenty-eight billion, eight hundred ninety-one million, two hundred two thousand, nine hundred ninety-four".