9978028431 has 48 divisors (see below), whose sum is σ = 15544293120. Its totient is φ = 5576376960.

The previous prime is 9978028387. The next prime is 9978028471. The reversal of 9978028431 is 1348208799.

9978028431 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9978028431 - 2⁶ = 9978028367 is a prime.

It is a super-2 number, since 2×9978028431² (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 (9978028471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30144936 + ... + 30145266.

It is an arithmetic number, because the mean of its divisors is an integer number (323839440).

Almost surely, 2^9978028431 is an apocalyptic number.

9978028431 is a deficient number, since it is larger than the sum of its proper divisors (5566264689).

9978028431 is a wasteful number, since it uses less digits than its factorization.

9978028431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 9978028431 is about 99890.0817448860. The cubic root of 9978028431 is about 2152.8556559898.

The spelling of 9978028431 in words is "nine billion, nine hundred seventy-eight million, twenty-eight thousand, four hundred thirty-one".