1909134890 has 32 divisors (see below), whose sum is σ = 3702779136. Its totient is φ = 704531520.

The previous prime is 1909134881. The next prime is 1909134911. The reversal of 1909134890 is 984319091.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383759 + ... + 388701.

It is an arithmetic number, because the mean of its divisors is an integer number (115711848).

Almost surely, 2^1909134890 is an apocalyptic number.

1909134890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1909134890 is a deficient number, since it is larger than the sum of its proper divisors (1793644246).

1909134890 is a wasteful number, since it uses less digits than its factorization.

1909134890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1909134890 is about 43693.6481653798. The cubic root of 1909134890 is about 1240.5440922181.

The spelling of 1909134890 in words is "one billion, nine hundred nine million, one hundred thirty-four thousand, eight hundred ninety".