9951430628 has 12 divisors (see below), whose sum is σ = 17418115260. Its totient is φ = 4974826272.

The previous prime is 9951430613. The next prime is 9951430637. The reversal of 9951430628 is 8260341599.

It can be written as a sum of positive squares in 2 ways, for example, as 981067684 + 8970362944 = 31322^2 + 94712^2 .

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, 196751 + ... + 242102.

It is an arithmetic number, because the mean of its divisors is an integer number (1451509605).

Almost surely, 2^9951430628 is an apocalyptic number.

It is an amenable number.

9951430628 is a deficient number, since it is larger than the sum of its proper divisors (7466684632).

9951430628 is a wasteful number, since it uses less digits than its factorization.

9951430628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444526 (or 444524 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 9951430628 is about 99756.8575487420. The cubic root of 9951430628 is about 2150.9410431073.

The spelling of 9951430628 in words is "nine billion, nine hundred fifty-one million, four hundred thirty thousand, six hundred twenty-eight".