78168441 has 16 divisors (see below), whose sum is σ = 112674240. Its totient is φ = 47918400.

The previous prime is 78168437. The next prime is 78168523. The reversal of 78168441 is 14486187.

It is not a de Polignac number, because 78168441 - 2² = 78168437 is a prime.

It is a super-2 number, since 2×78168441² = 12220610336740962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 78168441.

It is not an unprimeable number, because it can be changed into a prime (78168401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6766 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (7042140).

Almost surely, 2^78168441 is an apocalyptic number.

It is an amenable number.

78168441 is a deficient number, since it is larger than the sum of its proper divisors (34505799).

78168441 is a wasteful number, since it uses less digits than its factorization.

78168441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736.

The product of its digits is 43008, while the sum is 39.

The square root of 78168441 is about 8841.2918173760. The cubic root of 78168441 is about 427.5732072570.

The spelling of 78168441 in words is "seventy-eight million, one hundred sixty-eight thousand, four hundred forty-one".