78463844 has 12 divisors (see below), whose sum is σ = 144538800. Its totient is φ = 37167048.

The previous prime is 78463841. The next prime is 78463859. The reversal of 78463844 is 44836487.

It is a junction number, because it is equal to n+sod(n) for n = 78463795 and 78463804.

It is not an unprimeable number, because it can be changed into a prime (78463841) 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, 516134 + ... + 516285.

It is an arithmetic number, because the mean of its divisors is an integer number (12044900).

Almost surely, 2^78463844 is an apocalyptic number.

It is an amenable number.

78463844 is a deficient number, since it is larger than the sum of its proper divisors (66074956).

78463844 is a wasteful number, since it uses less digits than its factorization.

78463844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032442 (or 1032440 counting only the distinct ones).

The product of its digits is 516096, while the sum is 44.

The square root of 78463844 is about 8857.9819372135. The cubic root of 78463844 is about 428.1111380526. Note that the first 4 decimals are identical.

The spelling of 78463844 in words is "seventy-eight million, four hundred sixty-three thousand, eight hundred forty-four".