28998990468 has 180 divisors, whose sum is σ = 88592351232. Its totient is φ = 8247264480.

The previous prime is 28998990457. The next prime is 28998990469. The reversal of 28998990468 is 86409989982.

28998990468 is a `hidden beast` number, since 2 + 89 + 9 + 89 + 9 + 0 + 468 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28998990396 and 28998990405.

It is not an unprimeable number, because it can be changed into a prime (28998990469) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3536253 + ... + 3544443.

Almost surely, 2^28998990468 is an apocalyptic number.

28998990468 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 28998990468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44296175616).

28998990468 is an abundant number, since it is smaller than the sum of its proper divisors (59593360764).

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

28998990468 is a wasteful number, since it uses less digits than its factorization.

28998990468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8444 (or 8426 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 72.

The spelling of 28998990468 in words is "twenty-eight billion, nine hundred ninety-eight million, nine hundred ninety thousand, four hundred sixty-eight".