78012180 has 96 divisors (see below), whose sum is σ = 246153600. Its totient is φ = 20507904.

The previous prime is 78012139. The next prime is 78012199. The reversal of 78012180 is 8121087.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 38431 + ... + 40409.

It is an arithmetic number, because the mean of its divisors is an integer number (2564100).

Almost surely, 2^78012180 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 78012180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123076800).

78012180 is an abundant number, since it is smaller than the sum of its proper divisors (168141420).

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

78012180 is a wasteful number, since it uses less digits than its factorization.

78012180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 78012180 is about 8832.4503961245. The cubic root of 78012180 is about 427.2881067485.

The spelling of 78012180 in words is "seventy-eight million, twelve thousand, one hundred eighty".