28550740 has 24 divisors (see below), whose sum is σ = 60060672. Its totient is φ = 11400480.

The previous prime is 28550737. The next prime is 28550741. The reversal of 28550740 is 4705582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550741) 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, 17437 + ... + 19003.

It is an arithmetic number, because the mean of its divisors is an integer number (2502528).

Almost surely, 2^28550740 is an apocalyptic number.

28550740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28550740 is an abundant number, since it is smaller than the sum of its proper divisors (31509932).

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

28550740 is a wasteful number, since it uses less digits than its factorization.

28550740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487 (or 2485 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28550740 is about 5343.2892491423. The cubic root of 28550740 is about 305.6369025409.

The spelling of 28550740 in words is "twenty-eight million, five hundred fifty thousand, seven hundred forty".