28994877144 has 24 divisors (see below), whose sum is σ = 78527792460. Its totient is φ = 9664959024.

The previous prime is 28994877089. The next prime is 28994877181. The reversal of 28994877144 is 44177849982.

28994877144 is a `hidden beast` number, since 2 + 8 + 9 + 9 + 487 + 7 + 144 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 201353242 + ... + 201353385.

Almost surely, 2^28994877144 is an apocalyptic number.

28994877144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28994877144 is an abundant number, since it is smaller than the sum of its proper divisors (49532915316).

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

28994877144 is a wasteful number, since it uses less digits than its factorization.

28994877144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402706639 (or 402706632 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 28994877144 in words is "twenty-eight billion, nine hundred ninety-four million, eight hundred seventy-seven thousand, one hundred forty-four".