28655770 has 64 divisors (see below), whose sum is σ = 62778240. Its totient is φ = 9273600.

The previous prime is 28655747. The next prime is 28655771. The reversal of 28655770 is 7755682.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28655771) 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 31 ways as a sum of consecutive naturals, for example, 41125 + ... + 41815.

It is an arithmetic number, because the mean of its divisors is an integer number (980910).

Almost surely, 2^28655770 is an apocalyptic number.

28655770 is an abundant number, since it is smaller than the sum of its proper divisors (34122470).

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

28655770 is a wasteful number, since it uses less digits than its factorization.

28655770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 28655770 is about 5353.1084427648. The cubic root of 28655770 is about 306.0112274634.

The spelling of 28655770 in words is "twenty-eight million, six hundred fifty-five thousand, seven hundred seventy".