78060420 has 72 divisors (see below), whose sum is σ = 241847424. Its totient is φ = 20371008.

The previous prime is 78060403. The next prime is 78060443. The reversal of 78060420 is 2406087.

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, 3847 + ... + 13073.

It is an arithmetic number, because the mean of its divisors is an integer number (3358992).

Almost surely, 2^78060420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78060420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120923712).

78060420 is an abundant number, since it is smaller than the sum of its proper divisors (163787004).

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

78060420 is a wasteful number, since it uses less digits than its factorization.

78060420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9289 (or 9284 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 78060420 is about 8835.1808130904. The cubic root of 78060420 is about 427.3761619345.

The spelling of 78060420 in words is "seventy-eight million, sixty thousand, four hundred twenty".