78646146 has 16 divisors (see below), whose sum is σ = 158203584. Its totient is φ = 26063504.

The previous prime is 78646123. The next prime is 78646151. The reversal of 78646146 is 64164687.

It is a junction number, because it is equal to n+sod(n) for n = 78646098 and 78646107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36846 + ... + 38921.

It is an arithmetic number, because the mean of its divisors is an integer number (9887724).

Almost surely, 2^78646146 is an apocalyptic number.

78646146 is an abundant number, since it is smaller than the sum of its proper divisors (79557438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78646146 is a wasteful number, since it uses less digits than its factorization.

78646146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75945.

The product of its digits is 193536, while the sum is 42.

The square root of 78646146 is about 8868.2662341632. The cubic root of 78646146 is about 428.4424377836.

The spelling of 78646146 in words is "seventy-eight million, six hundred forty-six thousand, one hundred forty-six".