28681074 has 64 divisors (see below), whose sum is σ = 68256000. Its totient is φ = 8895744.

The previous prime is 28681073. The next prime is 28681097. The reversal of 28681074 is 47018682.

It is not an unprimeable number, because it can be changed into a prime (28681073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144027 + ... + 144225.

It is an arithmetic number, because the mean of its divisors is an integer number (1066500).

Almost surely, 2^28681074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28681074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34128000).

28681074 is an abundant number, since it is smaller than the sum of its proper divisors (39574926).

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

28681074 is a wasteful number, since it uses less digits than its factorization.

28681074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28681074 is about 5355.4714078221. The cubic root of 28681074 is about 306.1012736683.

The spelling of 28681074 in words is "twenty-eight million, six hundred eighty-one thousand, seventy-four".