28828578 has 16 divisors (see below), whose sum is σ = 58884480. Its totient is φ = 9404976.

The previous prime is 28828577. The next prime is 28828609. The reversal of 28828578 is 87582882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28828571) 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, 50833 + ... + 51396.

It is an arithmetic number, because the mean of its divisors is an integer number (3680280).

Almost surely, 2^28828578 is an apocalyptic number.

28828578 is an abundant number, since it is smaller than the sum of its proper divisors (30055902).

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

28828578 is a wasteful number, since it uses less digits than its factorization.

28828578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102281.

The product of its digits is 573440, while the sum is 48.

The square root of 28828578 is about 5369.2250837528. The cubic root of 28828578 is about 306.6251264359.

The spelling of 28828578 in words is "twenty-eight million, eight hundred twenty-eight thousand, five hundred seventy-eight".