9972438 has 32 divisors (see below), whose sum is σ = 24136704. Its totient is φ = 2681472.

The previous prime is 9972401. The next prime is 9972439. The reversal of 9972438 is 8342799.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9972438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972439) 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, 6270 + ... + 7697.

It is an arithmetic number, because the mean of its divisors is an integer number (754272).

Almost surely, 2^9972438 is an apocalyptic number.

9972438 is an abundant number, since it is smaller than the sum of its proper divisors (14164266).

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

9972438 is a wasteful number, since it uses less digits than its factorization.

9972438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13996.

The product of its digits is 108864, while the sum is 42.

The square root of 9972438 is about 3157.9167183445. The cubic root of 9972438 is about 215.2453517782.

The spelling of 9972438 in words is "nine million, nine hundred seventy-two thousand, four hundred thirty-eight".