78346656 has 48 divisors (see below), whose sum is σ = 228513600. Its totient is φ = 26115264.

The previous prime is 78346589. The next prime is 78346669. The reversal of 78346656 is 65664387.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×78346656² = 12276397012764672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44476 + ... + 46203.

It is an arithmetic number, because the mean of its divisors is an integer number (4760700).

Almost surely, 2^78346656 is an apocalyptic number.

It is an amenable number.

78346656 is an abundant number, since it is smaller than the sum of its proper divisors (150166944).

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

78346656 is a wasteful number, since it uses less digits than its factorization.

78346656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90698 (or 90684 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 78346656 is about 8851.3646405512. The cubic root of 78346656 is about 427.8978997730.

The spelling of 78346656 in words is "seventy-eight million, three hundred forty-six thousand, six hundred fifty-six".