28584740 has 24 divisors (see below), whose sum is σ = 63188160. Its totient is φ = 10831968.

The previous prime is 28584739. The next prime is 28584761. The reversal of 28584740 is 4748582.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 28584694 and 28584703.

It is an unprimeable number.

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, 37232 + ... + 37991.

It is an arithmetic number, because the mean of its divisors is an integer number (2632840).

Almost surely, 2^28584740 is an apocalyptic number.

28584740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28584740 is an abundant number, since it is smaller than the sum of its proper divisors (34603420).

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

28584740 is a wasteful number, since it uses less digits than its factorization.

28584740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75251 (or 75249 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 28584740 is about 5346.4698633771. The cubic root of 28584740 is about 305.7581782347.

The spelling of 28584740 in words is "twenty-eight million, five hundred eighty-four thousand, seven hundred forty".