890830809 has 24 divisors (see below), whose sum is σ = 1433607552. Its totient is φ = 528407520.

The previous prime is 890830741. The next prime is 890830813. The reversal of 890830809 is 908038098.

It is not a de Polignac number, because 890830809 - 2¹⁶ = 890765273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (890830859) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 91074 + ... + 100379.

It is an arithmetic number, because the mean of its divisors is an integer number (59733648).

Almost surely, 2^890830809 is an apocalyptic number.

It is an amenable number.

890830809 is a deficient number, since it is larger than the sum of its proper divisors (542776743).

890830809 is a wasteful number, since it uses less digits than its factorization.

890830809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191517 (or 191514 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 890830809 is about 29846.7889227635. The cubic root of 890830809 is about 962.1993876301.

The spelling of 890830809 in words is "eight hundred ninety million, eight hundred thirty thousand, eight hundred nine".