1009109190 has 64 divisors (see below), whose sum is σ = 2564835840. Its totient is φ = 253382400.

The previous prime is 1009109161. The next prime is 1009109207. The reversal of 1009109190 is 919019001.

It is a super-2 number, since 2×1009109190² = 2036602714684912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89890 + ... + 100490.

It is an arithmetic number, because the mean of its divisors is an integer number (40075560).

Almost surely, 2^1009109190 is an apocalyptic number.

1009109190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1009109190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282417920).

1009109190 is an abundant number, since it is smaller than the sum of its proper divisors (1555726650).

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

1009109190 is a wasteful number, since it uses less digits than its factorization.

1009109190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10797.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 1009109190 is about 31766.4790305756. The cubic root of 1009109190 is about 1003.0272233383.

The spelling of 1009109190 in words is "one billion, nine million, one hundred nine thousand, one hundred ninety".