1028566550 has 72 divisors (see below), whose sum is σ = 2115989568. Its totient is φ = 371694400.

The previous prime is 1028566531. The next prime is 1028566559. The reversal of 1028566550 is 556658201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028566559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1191419 + ... + 1192281.

It is an arithmetic number, because the mean of its divisors is an integer number (29388744).

Almost surely, 2^1028566550 is an apocalyptic number.

1028566550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1028566550 is an abundant number, since it is smaller than the sum of its proper divisors (1087423018).

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

1028566550 is a wasteful number, since it uses less digits than its factorization.

1028566550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 1028566550 is about 32071.2729713056. The cubic root of 1028566550 is about 1009.4329235068.

The spelling of 1028566550 in words is "one billion, twenty-eight million, five hundred sixty-six thousand, five hundred fifty".