9738897940 has 12 divisors (see below), whose sum is σ = 20451685716. Its totient is φ = 3895559168.

The previous prime is 9738897869. The next prime is 9738897941. The reversal of 9738897940 is 497988379.

It can be written as a sum of positive squares in 2 ways, for example, as 4903920784 + 4834977156 = 70028^2 + 69534^2 .

It is a super-2 number, since 2×9738897940² (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 (9738897941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243472429 + ... + 243472468.

It is an arithmetic number, because the mean of its divisors is an integer number (1704307143).

Almost surely, 2^9738897940 is an apocalyptic number.

It is an amenable number.

9738897940 is an abundant number, since it is smaller than the sum of its proper divisors (10712787776).

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

9738897940 is a wasteful number, since it uses less digits than its factorization.

9738897940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486944906 (or 486944904 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 64.

The square root of 9738897940 is about 98685.8548121259. The cubic root of 9738897940 is about 2135.5181728340.

The spelling of 9738897940 in words is "nine billion, seven hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred forty".