28705068 has 36 divisors (see below), whose sum is σ = 82926480. Its totient is φ = 8201376.

The previous prime is 28705049. The next prime is 28705069. The reversal of 28705068 is 86050782.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28705069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56703 + ... + 57206.

Almost surely, 2^28705068 is an apocalyptic number.

28705068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28705068 is an abundant number, since it is smaller than the sum of its proper divisors (54221412).

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

28705068 is a wasteful number, since it uses less digits than its factorization.

28705068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113926 (or 113921 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 28705068 is about 5357.7110784364. The cubic root of 28705068 is about 306.1866092314.

The spelling of 28705068 in words is "twenty-eight million, seven hundred five thousand, sixty-eight".