28977463980 has 144 divisors (see below), whose sum is σ = 88422114144. Its totient is φ = 7681443840.

The previous prime is 28977463871. The next prime is 28977463981. The reversal of 28977463980 is 8936477982.

28977463980 is a `hidden beast` number, since 2 + 8 + 97 + 7 + 463 + 9 + 80 = 666.

It is not an unprimeable number, because it can be changed into a prime (28977463981) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 32816619 + ... + 32817501.

Almost surely, 2^28977463980 is an apocalyptic number.

28977463980 is a gapful number since it is divisible by the number (20) 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 28977463980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44211057072).

28977463980 is an abundant number, since it is smaller than the sum of its proper divisors (59444650164).

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

28977463980 is a wasteful number, since it uses less digits than its factorization.

28977463980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 28977463980 in words is "twenty-eight billion, nine hundred seventy-seven million, four hundred sixty-three thousand, nine hundred eighty".