28870490880 has 1152 divisors, whose sum is σ = 134688153600. Its totient is φ = 5673369600.

The previous prime is 28870490863. The next prime is 28870490893. The reversal of 28870490880 is 8809407882.

28870490880 is a `hidden beast` number, since 2 + 8 + 8 + 70 + 490 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50560995 + ... + 50561565.

It is an arithmetic number, because the mean of its divisors is an integer number (116916800).

Almost surely, 2^28870490880 is an apocalyptic number.

28870490880 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 28870490880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67344076800).

28870490880 is an abundant number, since it is smaller than the sum of its proper divisors (105817662720).

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

28870490880 is a wasteful number, since it uses less digits than its factorization.

28870490880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 28870490880 in words is "twenty-eight billion, eight hundred seventy million, four hundred ninety thousand, eight hundred eighty".