28380550 has 36 divisors (see below), whose sum is σ = 58035348. Its totient is φ = 10318000.

The previous prime is 28380523. The next prime is 28380553. The reversal of 28380550 is 5508382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380553) 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 17 ways as a sum of consecutive naturals, for example, 3705 + ... + 8395.

It is an arithmetic number, because the mean of its divisors is an integer number (1612093).

Almost surely, 2^28380550 is an apocalyptic number.

28380550 is an abundant number, since it is smaller than the sum of its proper divisors (29654798).

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

28380550 is a wasteful number, since it uses less digits than its factorization.

28380550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725 (or 4709 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28380550 is about 5327.3398615069. The cubic root of 28380550 is about 305.0283947407.

The spelling of 28380550 in words is "twenty-eight million, three hundred eighty thousand, five hundred fifty".