9774027988 has 12 divisors (see below), whose sum is σ = 17125388532. Its totient is φ = 4881059840.

The previous prime is 9774027983. The next prime is 9774028009. The reversal of 9774027988 is 8897204779.

It can be written as a sum of positive squares in 2 ways, for example, as 5234233104 + 4539794884 = 72348^2 + 67378^2 .

It is a super-2 number, since 2×9774027988² (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 (9774027983) 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, 1484845 + ... + 1491412.

It is an arithmetic number, because the mean of its divisors is an integer number (1427115711).

Almost surely, 2^9774027988 is an apocalyptic number.

It is an amenable number.

9774027988 is a deficient number, since it is larger than the sum of its proper divisors (7351360544).

9774027988 is a wasteful number, since it uses less digits than its factorization.

9774027988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977082 (or 2977080 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 61.

The square root of 9774027988 is about 98863.6838682436. The cubic root of 9774027988 is about 2138.0828309677.

The spelling of 9774027988 in words is "nine billion, seven hundred seventy-four million, twenty-seven thousand, nine hundred eighty-eight".