478245978 has 96 divisors (see below), whose sum is σ = 1256973120. Its totient is φ = 134356320.

The previous prime is 478245973. The next prime is 478245991. The reversal of 478245978 is 879542874.

It is a happy number.

478245978 is a `hidden beast` number, since 47 + 8 + 2 + 4 + 597 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (478245973) 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, 159925 + ... + 162887.

It is an arithmetic number, because the mean of its divisors is an integer number (13093470).

Almost surely, 2^478245978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 478245978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628486560).

478245978 is an abundant number, since it is smaller than the sum of its proper divisors (778727142).

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

478245978 is a wasteful number, since it uses less digits than its factorization.

478245978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3036 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 478245978 is about 21868.8357714808. The cubic root of 478245978 is about 782.0186469565.

The spelling of 478245978 in words is "four hundred seventy-eight million, two hundred forty-five thousand, nine hundred seventy-eight".