9939662280 has 384 divisors, whose sum is σ = 35663846400. Its totient is φ = 2482659072.

The previous prime is 9939662279. The next prime is 9939662297. The reversal of 9939662280 is 822669399.

9939662280 is a `hidden beast` number, since 9 + 9 + 3 + 9 + 6 + 622 + 8 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19760509 + ... + 19761011.

It is an arithmetic number, because the mean of its divisors is an integer number (92874600).

Almost surely, 2^9939662280 is an apocalyptic number.

9939662280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9939662280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17831923200).

9939662280 is an abundant number, since it is smaller than the sum of its proper divisors (25724184120).

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

9939662280 is a wasteful number, since it uses less digits than its factorization.

9939662280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 9939662280 is about 99697.8549418191. The cubic root of 9939662280 is about 2150.0928231062.

The spelling of 9939662280 in words is "nine billion, nine hundred thirty-nine million, six hundred sixty-two thousand, two hundred eighty".