78728046 has 8 divisors (see below), whose sum is σ = 157456104. Its totient is φ = 26242680.

The previous prime is 78728017. The next prime is 78728047. The reversal of 78728046 is 64082787.

It is a sphenic number, since it is the product of 3 distinct primes.

78728046 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78727989 and 78728007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78728047) 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, 6560665 + ... + 6560676.

It is an arithmetic number, because the mean of its divisors is an integer number (19682013).

Almost surely, 2^78728046 is an apocalyptic number.

78728046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78728046 is a wasteful number, since it uses less digits than its factorization.

78728046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13121346.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 78728046 is about 8872.8826206594. The cubic root of 78728046 is about 428.5911090327.

The spelling of 78728046 in words is "seventy-eight million, seven hundred twenty-eight thousand, forty-six".