9642240 has 216 divisors, whose sum is σ = 35712768. Its totient is φ = 2488320.

The previous prime is 9642233. The next prime is 9642251. The reversal of 9642240 is 422469.

It is a tau number, because it is divible by the number of its divisors (216).

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

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311025 + ... + 311055.

Almost surely, 2^9642240 is an apocalyptic number.

9642240 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9642240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17856384).

9642240 is an abundant number, since it is smaller than the sum of its proper divisors (26070528).

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

9642240 is an equidigital number, since it uses as much as digits as its factorization.

9642240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 9642240 is about 3105.1956460101. The cubic root of 9642240 is about 212.8429709518.

The spelling of 9642240 in words is "nine million, six hundred forty-two thousand, two hundred forty".