78685470 has 48 divisors (see below), whose sum is σ = 207651600. Its totient is φ = 20668032.

The previous prime is 78685463. The next prime is 78685483. The reversal of 78685470 is 7458687.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 495 + ... + 12554.

It is an arithmetic number, because the mean of its divisors is an integer number (4326075).

Almost surely, 2^78685470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78685470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103825800).

78685470 is an abundant number, since it is smaller than the sum of its proper divisors (128966130).

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

78685470 is a wasteful number, since it uses less digits than its factorization.

78685470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13129 (or 13126 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 78685470 is about 8870.4830759097. The cubic root of 78685470 is about 428.5138346415.

The spelling of 78685470 in words is "seventy-eight million, six hundred eighty-five thousand, four hundred seventy".