78239441 has 8 divisors (see below), whose sum is σ = 89470080. Its totient is φ = 67022208.

The previous prime is 78239417. The next prime is 78239449. The reversal of 78239441 is 14493287.

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 78239441 - 2¹⁸ = 77977297 is a prime.

It is a super-2 number, since 2×78239441² = 12242820255984962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78239395 and 78239404.

It is not an unprimeable number, because it can be changed into a prime (78239449) 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, 20420 + ... + 23946.

It is an arithmetic number, because the mean of its divisors is an integer number (11183760).

Almost surely, 2^78239441 is an apocalyptic number.

It is an amenable number.

78239441 is a deficient number, since it is larger than the sum of its proper divisors (11230639).

78239441 is a wasteful number, since it uses less digits than its factorization.

78239441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703.

The product of its digits is 48384, while the sum is 38.

The square root of 78239441 is about 8845.3061563747. The cubic root of 78239441 is about 427.7026222772.

The spelling of 78239441 in words is "seventy-eight million, two hundred thirty-nine thousand, four hundred forty-one".