9478279440 has 240 divisors, whose sum is σ = 37153479168. Its totient is φ = 2120315904.

The previous prime is 9478279423. The next prime is 9478279441. The reversal of 9478279440 is 449728749.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×9478279440² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9478279441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216874 + ... + 256886.

Almost surely, 2^9478279440 is an apocalyptic number.

9478279440 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 9478279440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18576739584).

9478279440 is an abundant number, since it is smaller than the sum of its proper divisors (27675199728).

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

9478279440 is a wasteful number, since it uses less digits than its factorization.

9478279440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40086 (or 40077 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 9478279440 is about 97356.4555640765. The cubic root of 9478279440 is about 2116.2964470677.

The spelling of 9478279440 in words is "nine billion, four hundred seventy-eight million, two hundred seventy-nine thousand, four hundred forty".