78442183 has 8 divisors (see below), whose sum is σ = 83162240. Its totient is φ = 73859040.

The previous prime is 78442171. The next prime is 78442207. The reversal of 78442183 is 38124487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78442183 - 2²⁵ = 44887751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78442103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33048 + ... + 35341.

It is an arithmetic number, because the mean of its divisors is an integer number (10395280).

Almost surely, 2^78442183 is an apocalyptic number.

78442183 is a deficient number, since it is larger than the sum of its proper divisors (4720057).

78442183 is a wasteful number, since it uses less digits than its factorization.

78442183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68457.

The product of its digits is 43008, while the sum is 37.

The square root of 78442183 is about 8856.7591702609. The cubic root of 78442183 is about 428.0717391466.

The spelling of 78442183 in words is "seventy-eight million, four hundred forty-two thousand, one hundred eighty-three".