28954007280 has 400 divisors, whose sum is σ = 115482787200. Its totient is φ = 6649413120.

The previous prime is 28954007279. The next prime is 28954007297. The reversal of 28954007280 is 8270045982.

28954007280 is a `hidden beast` number, since 2 + 89 + 540 + 0 + 7 + 28 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1343631 + ... + 1365009.

It is an arithmetic number, because the mean of its divisors is an integer number (288706968).

Almost surely, 2^28954007280 is an apocalyptic number.

28954007280 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 28954007280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57741393600).

28954007280 is an abundant number, since it is smaller than the sum of its proper divisors (86528779920).

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

28954007280 is a wasteful number, since it uses less digits than its factorization.

28954007280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21434 (or 21419 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 28954007280 in words is "twenty-eight billion, nine hundred fifty-four million, seven thousand, two hundred eighty".