28621835 has 16 divisors (see below), whose sum is σ = 38679552. Its totient is φ = 20143200.

The previous prime is 28621823. The next prime is 28621837. The reversal of 28621835 is 53812682.

It is not a de Polignac number, because 28621835 - 2⁴ = 28621819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28621795 and 28621804.

It is not an unprimeable number, because it can be changed into a prime (28621837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6689 + ... + 10098.

It is an arithmetic number, because the mean of its divisors is an integer number (2417472).

Almost surely, 2^28621835 is an apocalyptic number.

28621835 is a deficient number, since it is larger than the sum of its proper divisors (10057717).

28621835 is a wasteful number, since it uses less digits than its factorization.

28621835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16834.

The product of its digits is 23040, while the sum is 35.

The square root of 28621835 is about 5349.9378501063. The cubic root of 28621835 is about 305.8903839368.

The spelling of 28621835 in words is "twenty-eight million, six hundred twenty-one thousand, eight hundred thirty-five".