28820634 has 8 divisors (see below), whose sum is σ = 57641280. Its totient is φ = 9606876.

The previous prime is 28820629. The next prime is 28820639. The reversal of 28820634 is 43602882.

It is an interprime number because it is at equal distance from previous prime (28820629) and next prime (28820639).

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

28820634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28820595 and 28820604.

It is not an unprimeable number, because it can be changed into a prime (28820639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2401714 + ... + 2401725.

It is an arithmetic number, because the mean of its divisors is an integer number (7205160).

Almost surely, 2^28820634 is an apocalyptic number.

28820634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28820634 is a wasteful number, since it uses less digits than its factorization.

28820634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803444.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28820634 is about 5368.4852612259. The cubic root of 28820634 is about 306.5969593190.

The spelling of 28820634 in words is "twenty-eight million, eight hundred twenty thousand, six hundred thirty-four".