78327018 has 96 divisors (see below), whose sum is σ = 218529792. Its totient is φ = 19677600.

The previous prime is 78327001. The next prime is 78327061. The reversal of 78327018 is 81072387.

It is a super-2 number, since 2×78327018² = 12270243497544648, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42055 + ... + 43877.

It is an arithmetic number, because the mean of its divisors is an integer number (2276352).

Almost surely, 2^78327018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78327018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109264896).

78327018 is an abundant number, since it is smaller than the sum of its proper divisors (140202774).

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

78327018 is a wasteful number, since it uses less digits than its factorization.

78327018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 78327018 is about 8850.2552505563. The cubic root of 78327018 is about 427.8621451683.

The spelling of 78327018 in words is "seventy-eight million, three hundred twenty-seven thousand, eighteen".