1009190920 has 16 divisors (see below), whose sum is σ = 2270679660. Its totient is φ = 403676352.

The previous prime is 1009190899. The next prime is 1009190927. The reversal of 1009190920 is 290919001.

It can be written as a sum of positive squares in 2 ways, for example, as 903964356 + 105226564 = 30066^2 + 10258^2 .

It is not an unprimeable number, because it can be changed into a prime (1009190927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12614847 + ... + 12614926.

Almost surely, 2^1009190920 is an apocalyptic number.

1009190920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1009190920 is an abundant number, since it is smaller than the sum of its proper divisors (1261488740).

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

1009190920 is a wasteful number, since it uses less digits than its factorization.

1009190920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25229784 (or 25229780 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 1009190920 is about 31767.7654234603. The cubic root of 1009190920 is about 1003.0543017432.

The spelling of 1009190920 in words is "one billion, nine million, one hundred ninety thousand, nine hundred twenty".