9771438 has 16 divisors (see below), whose sum is σ = 19578960. Its totient is φ = 3251136.

The previous prime is 9771427. The next prime is 9771439. The reversal of 9771438 is 8341779.

9771438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9771396 and 9771405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9771439) 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, 3106 + ... + 5402.

It is an arithmetic number, because the mean of its divisors is an integer number (1223685).

Almost surely, 2^9771438 is an apocalyptic number.

9771438 is an abundant number, since it is smaller than the sum of its proper divisors (9807522).

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

9771438 is a wasteful number, since it uses less digits than its factorization.

9771438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011.

The product of its digits is 42336, while the sum is 39.

The square root of 9771438 is about 3125.9299416334. The cubic root of 9771438 is about 213.7893959737.

It can be divided in two parts, 977 and 1438, that added together give a triangular number (2415 = T₆₉).

The spelling of 9771438 in words is "nine million, seven hundred seventy-one thousand, four hundred thirty-eight".