28270782 has 60 divisors (see below), whose sum is σ = 65543280. Its totient is φ = 9106344.

The previous prime is 28270777. The next prime is 28270811. The reversal of 28270782 is 28707282.

It is a super-2 number, since 2×28270782² = 1598474229783048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 357819 + ... + 357897.

It is an arithmetic number, because the mean of its divisors is an integer number (1092388).

Almost surely, 2^28270782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28270782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32771640).

28270782 is an abundant number, since it is smaller than the sum of its proper divisors (37272498).

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

28270782 is an equidigital number, since it uses as much as digits as its factorization.

28270782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 28270782 is about 5317.0275530601. The cubic root of 28270782 is about 304.6346319158.

The spelling of 28270782 in words is "twenty-eight million, two hundred seventy thousand, seven hundred eighty-two".