9928951840 has 48 divisors (see below), whose sum is σ = 23474126592. Its totient is φ = 3968706304.

The previous prime is 9928951829. The next prime is 9928951841. The reversal of 9928951840 is 481598299.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9928951841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206577 + ... + 250063.

It is an arithmetic number, because the mean of its divisors is an integer number (489044304).

Almost surely, 2^9928951840 is an apocalyptic number.

It is an amenable number.

9928951840 is an abundant number, since it is smaller than the sum of its proper divisors (13545174752).

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

9928951840 is a wasteful number, since it uses less digits than its factorization.

9928951840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44929 (or 44921 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The square root of 9928951840 is about 99644.1259683681. The cubic root of 9928951840 is about 2149.3202711528.

The spelling of 9928951840 in words is "nine billion, nine hundred twenty-eight million, nine hundred fifty-one thousand, eight hundred forty".