28946630178 has 64 divisors (see below), whose sum is σ = 66437521920. Its totient is φ = 9336324816.

The previous prime is 28946630143. The next prime is 28946630183. The reversal of 28946630178 is 87103664982.

28946630178 is a `hidden beast` number, since 2 + 8 + 9 + 466 + 3 + 0 + 178 = 666.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 190201 + ... + 306707.

It is an arithmetic number, because the mean of its divisors is an integer number (1038086280).

Almost surely, 2^28946630178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28946630178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33218760960).

28946630178 is an abundant number, since it is smaller than the sum of its proper divisors (37490891742).

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

28946630178 is a wasteful number, since it uses less digits than its factorization.

28946630178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116668 (or 116662 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 28946630178 in words is "twenty-eight billion, nine hundred forty-six million, six hundred thirty thousand, one hundred seventy-eight".