28706930 has 32 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 9524160.

The previous prime is 28706917. The next prime is 28706969. The reversal of 28706930 is 3960782.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

28706930 is a modest number, since divided by 6930 gives 2870 as remainder.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4445 + ... + 8784.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^28706930 is an apocalyptic number.

28706930 is an abundant number, since it is smaller than the sum of its proper divisors (32256910).

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

28706930 is a wasteful number, since it uses less digits than its factorization.

28706930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13274.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 28706930 is about 5357.8848438540. The cubic root of 28706930 is about 306.1932295158.

The spelling of 28706930 in words is "twenty-eight million, seven hundred six thousand, nine hundred thirty".