28862688 has 48 divisors (see below), whose sum is σ = 77623056. Its totient is φ = 9384960.

The previous prime is 28862671. The next prime is 28862689. The reversal of 28862688 is 88626882.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28862689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270 + ... + 7602.

It is an arithmetic number, because the mean of its divisors is an integer number (1617147).

Almost surely, 2^28862688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28862688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38811528).

28862688 is an abundant number, since it is smaller than the sum of its proper divisors (48760368).

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

28862688 is a wasteful number, since it uses less digits than its factorization.

28862688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7387 (or 7379 counting only the distinct ones).

The product of its digits is 589824, while the sum is 48.

The square root of 28862688 is about 5372.4005807460. The cubic root of 28862688 is about 306.7460118151.

The spelling of 28862688 in words is "twenty-eight million, eight hundred sixty-two thousand, six hundred eighty-eight".