1020909904 has 30 divisors (see below), whose sum is σ = 2300955594. Its totient is φ = 437532480.

The previous prime is 1020909899. The next prime is 1020909931. The reversal of 1020909904 is 4099090201.

It can be written as a sum of positive squares in only one way, i.e., 1001089600 + 19820304 = 31640^2 + 4452^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1020909904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 650307 + ... + 651874.

Almost surely, 2^1020909904 is an apocalyptic number.

1020909904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1020909904 is an abundant number, since it is smaller than the sum of its proper divisors (1280045690).

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

1020909904 is a wasteful number, since it uses less digits than its factorization.

1020909904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302203 (or 1302190 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 1020909904 is about 31951.6807695620. The cubic root of 1020909904 is about 1006.9219441383.

The spelling of 1020909904 in words is "one billion, twenty million, nine hundred nine thousand, nine hundred four".