28954881065880 has 2880 divisors, whose sum is σ = 129943796970240. Its totient is φ = 5740507584000.

The previous prime is 28954881065863. The next prime is 28954881065897. The reversal of 28954881065880 is 8856018845982.

28954881065880 is a `hidden beast` number, since 2 + 8 + 9 + 5 + 488 + 1 + 0 + 65 + 8 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (28954881065863) and next prime (28954881065897).

It is a super-2 number, since 2×28954881065880² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 28954881065799 and 28954881065808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 719 ways as a sum of consecutive naturals, for example, 407815226245 + ... + 407815226315.

It is an arithmetic number, because the mean of its divisors is an integer number (45119373948).

Almost surely, 2^{28954881065880} is an apocalyptic number.

28954881065880 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 28954881065880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64971898485120).

28954881065880 is an abundant number, since it is smaller than the sum of its proper divisors (100988915904360).

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

28954881065880 is an equidigital number, since it uses as much as digits as its factorization.

28954881065880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 353894400, while the sum is 72.

The spelling of 28954881065880 in words is "twenty-eight trillion, nine hundred fifty-four billion, eight hundred eighty-one million, sixty-five thousand, eight hundred eighty".