9639738 has 24 divisors (see below), whose sum is σ = 21153600. Its totient is φ = 3172104.

The previous prime is 9639719. The next prime is 9639757. The reversal of 9639738 is 8379369.

It is a happy number.

9639738 is a `hidden beast` number, since 9 + 639 + 7 + 3 + 8 = 666.

9639738 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9639719) and next prime (9639757).

It is a junction number, because it is equal to n+sod(n) for n = 9639693 and 9639702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1968 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (881400).

Almost surely, 2^9639738 is an apocalyptic number.

9639738 is an abundant number, since it is smaller than the sum of its proper divisors (11513862).

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

9639738 is a wasteful number, since it uses less digits than its factorization.

9639738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866 (or 6863 counting only the distinct ones).

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

The square root of 9639738 is about 3104.7927467063. The cubic root of 9639738 is about 212.8245596289.

It can be divided in two parts, 963 and 9738, that added together give a palindrome (10701).

The spelling of 9639738 in words is "nine million, six hundred thirty-nine thousand, seven hundred thirty-eight".