28082780 has 24 divisors (see below), whose sum is σ = 64335600. Its totient is φ = 10211840.

The previous prime is 28082777. The next prime is 28082783. The reversal of 28082780 is 8728082.

It is an interprime number because it is at equal distance from previous prime (28082777) and next prime (28082783).

It is a self number, because there is not a number n which added to its sum of digits gives 28082780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28082783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63605 + ... + 64044.

It is an arithmetic number, because the mean of its divisors is an integer number (2680650).

Almost surely, 2^28082780 is an apocalyptic number.

28082780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28082780 is an abundant number, since it is smaller than the sum of its proper divisors (36252820).

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

28082780 is a wasteful number, since it uses less digits than its factorization.

28082780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127669 (or 127667 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 28082780 is about 5299.3188241509. The cubic root of 28082780 is about 303.9578513818.

The spelling of 28082780 in words is "twenty-eight million, eighty-two thousand, seven hundred eighty".