9720432 has 40 divisors (see below), whose sum is σ = 27902480. Its totient is φ = 3240000.

The previous prime is 9720407. The next prime is 9720433. The reversal of 9720432 is 2340279.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 9720396 and 9720405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720433) 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, 10819 + ... + 11682.

It is an arithmetic number, because the mean of its divisors is an integer number (697562).

Almost surely, 2^9720432 is an apocalyptic number.

It is an amenable number.

9720432 is an abundant number, since it is smaller than the sum of its proper divisors (18182048).

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

9720432 is a wasteful number, since it uses less digits than its factorization.

9720432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22518 (or 22506 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 9720432 is about 3117.7607348865. The cubic root of 9720432 is about 213.4167599055.

The spelling of 9720432 in words is "nine million, seven hundred twenty thousand, four hundred thirty-two".