9885955278 has 32 divisors (see below), whose sum is σ = 20211125760. Its totient is φ = 3222244800.

The previous prime is 9885955271. The next prime is 9885955283. The reversal of 9885955278 is 8725595889.

It is a super-2 number, since 2×9885955278² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9885955271) 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, 302853 + ... + 333903.

It is an arithmetic number, because the mean of its divisors is an integer number (631597680).

Almost surely, 2^9885955278 is an apocalyptic number.

9885955278 is an abundant number, since it is smaller than the sum of its proper divisors (10325170482).

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

9885955278 is a wasteful number, since it uses less digits than its factorization.

9885955278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32232.

The product of its digits is 72576000, while the sum is 66.

The square root of 9885955278 is about 99428.1412780104. The cubic root of 9885955278 is about 2146.2132932970.

The spelling of 9885955278 in words is "nine billion, eight hundred eighty-five million, nine hundred fifty-five thousand, two hundred seventy-eight".