1020809466 has 96 divisors (see below), whose sum is σ = 2430005760. Its totient is φ = 320281776.

The previous prime is 1020809459. The next prime is 1020809479. The reversal of 1020809466 is 6649080201.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020809466.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2095875 + ... + 2096361.

It is an arithmetic number, because the mean of its divisors is an integer number (25312560).

Almost surely, 2^1020809466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020809466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215002880).

1020809466 is an abundant number, since it is smaller than the sum of its proper divisors (1409196294).

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

1020809466 is a wasteful number, since it uses less digits than its factorization.

1020809466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1020809466 is about 31950.1090138985. The cubic root of 1020809466 is about 1006.8889224379. Note that the first 3 decimals are identical.

Adding to 1020809466 its reverse (6649080201), we get a palindrome (7669889667).

The spelling of 1020809466 in words is "one billion, twenty million, eight hundred nine thousand, four hundred sixty-six".