78371384 has 80 divisors (see below), whose sum is σ = 185646000. Its totient is φ = 31004064.

The previous prime is 78371341. The next prime is 78371389. The reversal of 78371384 is 48317387.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a super-2 number, since 2×78371384² = 12284147660150912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78371389) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6028562 + ... + 6028574.

It is an arithmetic number, because the mean of its divisors is an integer number (2320575).

Almost surely, 2^78371384 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 78371384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92823000).

78371384 is an abundant number, since it is smaller than the sum of its proper divisors (107274616).

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

78371384 is an frugal number, since it uses more digits than its factorization.

78371384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 22 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 78371384 is about 8852.7613771071. The cubic root of 78371384 is about 427.9429131652.

The spelling of 78371384 in words is "seventy-eight million, three hundred seventy-one thousand, three hundred eighty-four".