28820141 has 8 divisors (see below), whose sum is σ = 32989440. Its totient is φ = 24663888.

The previous prime is 28820119. The next prime is 28820149. The reversal of 28820141 is 14102882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28820141 - 2²² = 24625837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28820141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (4123680).

Almost surely, 2^28820141 is an apocalyptic number.

It is an amenable number.

28820141 is a deficient number, since it is larger than the sum of its proper divisors (4169299).

28820141 is an equidigital number, since it uses as much as digits as its factorization.

28820141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 28820141 is about 5368.4393449121. The cubic root of 28820141 is about 306.5952111137.

The spelling of 28820141 in words is "twenty-eight million, eight hundred twenty thousand, one hundred forty-one".