78472470 has 64 divisors (see below), whose sum is σ = 204687360. Its totient is φ = 19180800.

The previous prime is 78472447. The next prime is 78472529. The reversal of 78472470 is 7427487.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 15450 + ... + 19890.

It is an arithmetic number, because the mean of its divisors is an integer number (3198240).

Almost surely, 2^78472470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78472470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102343680).

78472470 is an abundant number, since it is smaller than the sum of its proper divisors (126214890).

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

78472470 is a wasteful number, since it uses less digits than its factorization.

78472470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 78472470 is about 8858.4688293181. The cubic root of 78472470 is about 428.1268257510.

The spelling of 78472470 in words is "seventy-eight million, four hundred seventy-two thousand, four hundred seventy".