28924580 has 24 divisors (see below), whose sum is σ = 60895800. Its totient is φ = 11540480.

The previous prime is 28924541. The next prime is 28924583. The reversal of 28924580 is 8542982.

It can be written as a sum of positive squares in 4 ways, for example, as 7171684 + 21752896 = 2678^2 + 4664^2 .

It is not an unprimeable number, because it can be changed into a prime (28924583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7370 + ... + 10590.

It is an arithmetic number, because the mean of its divisors is an integer number (2537325).

Almost surely, 2^28924580 is an apocalyptic number.

28924580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28924580 is an abundant number, since it is smaller than the sum of its proper divisors (31971220).

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

28924580 is a wasteful number, since it uses less digits than its factorization.

28924580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679 (or 3677 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28924580 is about 5378.1576771233. The cubic root of 28924580 is about 306.9651132606.

The spelling of 28924580 in words is "twenty-eight million, nine hundred twenty-four thousand, five hundred eighty".