28820363 has 24 divisors (see below), whose sum is σ = 34982640. Its totient is φ = 23405760.

The previous prime is 28820347. The next prime is 28820369. The reversal of 28820363 is 36302882.

It is a happy number.

It is not a de Polignac number, because 28820363 - 2⁴ = 28820347 is a prime.

It is a super-2 number, since 2×28820363² = 1661226646903538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28820369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264353 + ... + 264461.

It is an arithmetic number, because the mean of its divisors is an integer number (1457610).

Almost surely, 2^28820363 is an apocalyptic number.

28820363 is a deficient number, since it is larger than the sum of its proper divisors (6162277).

28820363 is a wasteful number, since it uses less digits than its factorization.

28820363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 28820363 is about 5368.4600212724. The cubic root of 28820363 is about 306.5959983405.

The spelling of 28820363 in words is "twenty-eight million, eight hundred twenty thousand, three hundred sixty-three".