28820623 has 8 divisors (see below), whose sum is σ = 31248000. Its totient is φ = 26423328.

The previous prime is 28820569. The next prime is 28820629. The reversal of 28820623 is 32602882.

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 28820623 - 2¹³ = 28812431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820629) 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, 5503 + ... + 9376.

It is an arithmetic number, because the mean of its divisors is an integer number (3906000).

Almost surely, 2^28820623 is an apocalyptic number.

28820623 is a deficient number, since it is larger than the sum of its proper divisors (2427377).

28820623 is a wasteful number, since it uses less digits than its factorization.

28820623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15041.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28820623 is about 5368.4842367283. The cubic root of 28820623 is about 306.5969203126.

The spelling of 28820623 in words is "twenty-eight million, eight hundred twenty thousand, six hundred twenty-three".