9920090228 has 12 divisors (see below), whose sum is σ = 18273850560. Its totient is φ = 4698990072.

The previous prime is 9920090137. The next prime is 9920090249. The reversal of 9920090228 is 8220900299.

It is a happy number.

It is a super-2 number, since 2×9920090228² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65263676 + ... + 65263827.

It is an arithmetic number, because the mean of its divisors is an integer number (1522820880).

Almost surely, 2^9920090228 is an apocalyptic number.

It is an amenable number.

9920090228 is a deficient number, since it is larger than the sum of its proper divisors (8353760332).

9920090228 is a wasteful number, since it uses less digits than its factorization.

9920090228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130527526 (or 130527524 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 9920090228 is about 99599.6497383399. The cubic root of 9920090228 is about 2148.6806564263.

The spelling of 9920090228 in words is "nine billion, nine hundred twenty million, ninety thousand, two hundred twenty-eight".