1009805420 has 36 divisors (see below), whose sum is σ = 2296269360. Its totient is φ = 372849984.

The previous prime is 1009805399. The next prime is 1009805437. The reversal of 1009805420 is 245089001.

It is a super-2 number, since 2×1009805420² = 2039413972522752800, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 146000 + ... + 152759.

It is an arithmetic number, because the mean of its divisors is an integer number (63785260).

Almost surely, 2^1009805420 is an apocalyptic number.

1009805420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1009805420 is an abundant number, since it is smaller than the sum of its proper divisors (1286463940).

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

1009805420 is a wasteful number, since it uses less digits than its factorization.

1009805420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298794 (or 298779 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1009805420 is about 31777.4357052296. The cubic root of 1009805420 is about 1003.2578482324.

The spelling of 1009805420 in words is "one billion, nine million, eight hundred five thousand, four hundred twenty".