78336146 has 16 divisors (see below), whose sum is σ = 136183680. Its totient is φ = 33099360.

The previous prime is 78336121. The next prime is 78336149. The reversal of 78336146 is 64163387.

It is a super-2 number, since 2×78336146² = 12273103540266632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78336149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38411 + ... + 40398.

It is an arithmetic number, because the mean of its divisors is an integer number (8511480).

Almost surely, 2^78336146 is an apocalyptic number.

78336146 is a deficient number, since it is larger than the sum of its proper divisors (57847534).

78336146 is a wasteful number, since it uses less digits than its factorization.

78336146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78889.

The product of its digits is 72576, while the sum is 38.

The square root of 78336146 is about 8850.7709268741. The cubic root of 78336146 is about 427.8787651208.

The spelling of 78336146 in words is "seventy-eight million, three hundred thirty-six thousand, one hundred forty-six".