28505982 has 8 divisors (see below), whose sum is σ = 57011976. Its totient is φ = 9501992.

The previous prime is 28505969. The next prime is 28506011. The reversal of 28505982 is 28950582.

It is a sphenic number, since it is the product of 3 distinct primes.

28505982 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28505982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2375493 + ... + 2375504.

It is an arithmetic number, because the mean of its divisors is an integer number (7126497).

Almost surely, 2^28505982 is an apocalyptic number.

28505982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28505982 is a wasteful number, since it uses less digits than its factorization.

28505982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751002.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 28505982 is about 5339.0993622520. The cubic root of 28505982 is about 305.4771069033.

The spelling of 28505982 in words is "twenty-eight million, five hundred five thousand, nine hundred eighty-two".