9973638 has 32 divisors (see below), whose sum is σ = 22302720. Its totient is φ = 3303720.

The previous prime is 9973631. The next prime is 9973669. The reversal of 9973638 is 8363799.

It is a happy number.

9973638 is a `hidden beast` number, since 9 + 9 + 7 + 3 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 9973593 and 9973602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9831 + ... + 10797.

It is an arithmetic number, because the mean of its divisors is an integer number (696960).

Almost surely, 2^9973638 is an apocalyptic number.

9973638 is an abundant number, since it is smaller than the sum of its proper divisors (12329082).

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

9973638 is a wasteful number, since it uses less digits than its factorization.

9973638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1163 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 9973638 is about 3158.1067113066. The cubic root of 9973638 is about 215.2539850420.

It can be divided in two parts, 99 and 73638, that added together give a palindrome (73737).

The spelling of 9973638 in words is "nine million, nine hundred seventy-three thousand, six hundred thirty-eight".