9809085690 has 32 divisors (see below), whose sum is σ = 26157562560. Its totient is φ = 2615756112.

The previous prime is 9809085679. The next prime is 9809085691. The reversal of 9809085690 is 965809089.

It is a super-2 number, since 2×9809085690² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (9809085691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18164704 + ... + 18165243.

It is an arithmetic number, because the mean of its divisors is an integer number (817423830).

Almost surely, 2^9809085690 is an apocalyptic number.

9809085690 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9809085690 is an abundant number, since it is smaller than the sum of its proper divisors (16348476870).

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

9809085690 is a wasteful number, since it uses less digits than its factorization.

9809085690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36329963 (or 36329957 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 9809085690 is about 99040.8283992011. The cubic root of 9809085690 is about 2140.6360884616.

The spelling of 9809085690 in words is "nine billion, eight hundred nine million, eighty-five thousand, six hundred ninety".