78000844 has 6 divisors (see below), whose sum is σ = 136501484. Its totient is φ = 39000420.

The previous prime is 78000841. The next prime is 78000859. The reversal of 78000844 is 44800087.

78000844 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

78000844 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (78000841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9750102 + ... + 9750109.

Almost surely, 2^78000844 is an apocalyptic number.

It is an amenable number.

78000844 is a deficient number, since it is larger than the sum of its proper divisors (58500640).

78000844 is a wasteful number, since it uses less digits than its factorization.

78000844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19500215 (or 19500213 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 78000844 is about 8831.8086482894. The cubic root of 78000844 is about 427.2674092428.

The spelling of 78000844 in words is "seventy-eight million, eight hundred forty-four", and thus it is an aban number.