9940819290 has 64 divisors (see below), whose sum is σ = 24719081472. Its totient is φ = 2555841600.

The previous prime is 9940819289. The next prime is 9940819307. The reversal of 9940819290 is 929180499.

It is a happy number.

It is a super-2 number, since 2×9940819290² (a number of 21 digits) contains 22 as substring.

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, 232309 + ... + 271751.

It is an arithmetic number, because the mean of its divisors is an integer number (386235648).

Almost surely, 2^9940819290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9940819290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12359540736).

9940819290 is an abundant number, since it is smaller than the sum of its proper divisors (14778262182).

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

9940819290 is a wasteful number, since it uses less digits than its factorization.

9940819290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39755.

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 9940819290 is about 99703.6573551843. The cubic root of 9940819290 is about 2150.1762458728.

The spelling of 9940819290 in words is "nine billion, nine hundred forty million, eight hundred nineteen thousand, two hundred ninety".