78846441 has 4 divisors (see below), whose sum is σ = 105128592. Its totient is φ = 52564292.

The previous prime is 78846437. The next prime is 78846451. The reversal of 78846441 is 14464887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14464887 = 3 ⋅4821629.

It is a cyclic number.

It is not a de Polignac number, because 78846441 - 2² = 78846437 is a prime.

It is a super-2 number, since 2×78846441² = 12433522516732962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78846393 and 78846402.

It is not an unprimeable number, because it can be changed into a prime (78846421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13141071 + ... + 13141076.

It is an arithmetic number, because the mean of its divisors is an integer number (26282148).

Almost surely, 2^78846441 is an apocalyptic number.

It is an amenable number.

78846441 is a deficient number, since it is larger than the sum of its proper divisors (26282151).

78846441 is a wasteful number, since it uses less digits than its factorization.

78846441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282150.

The product of its digits is 172032, while the sum is 42.

The square root of 78846441 is about 8879.5518467995. The cubic root of 78846441 is about 428.8058466921.

The spelling of 78846441 in words is "seventy-eight million, eight hundred forty-six thousand, four hundred forty-one".