1004909020 has 48 divisors (see below), whose sum is σ = 2185682688. Its totient is φ = 387694080.

The previous prime is 1004908999. The next prime is 1004909053. The reversal of 1004909020 is 209094001.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 193984 + ... + 199096.

It is an arithmetic number, because the mean of its divisors is an integer number (45535056).

Almost surely, 2^1004909020 is an apocalyptic number.

1004909020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1004909020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092841344).

1004909020 is an abundant number, since it is smaller than the sum of its proper divisors (1180773668).

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

1004909020 is a wasteful number, since it uses less digits than its factorization.

1004909020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470 (or 5468 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1004909020 is about 31700.2999985805. The cubic root of 1004909020 is about 1001.6336696701.

The spelling of 1004909020 in words is "one billion, four million, nine hundred nine thousand, twenty".