1005009550 has 12 divisors (see below), whose sum is σ = 1869317856. Its totient is φ = 402003800.

The previous prime is 1005009493. The next prime is 1005009557. The reversal of 1005009550 is 559005001.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005009557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10050046 + ... + 10050145.

It is an arithmetic number, because the mean of its divisors is an integer number (155776488).

Almost surely, 2^1005009550 is an apocalyptic number.

1005009550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1005009550 is a deficient number, since it is larger than the sum of its proper divisors (864308306).

1005009550 is a wasteful number, since it uses less digits than its factorization.

1005009550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100203 (or 20100198 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 1005009550 is about 31701.8855906080. The cubic root of 1005009550 is about 1001.6670693355.

The spelling of 1005009550 in words is "one billion, five million, nine thousand, five hundred fifty".