78457746 has 8 divisors (see below), whose sum is σ = 156915504. Its totient is φ = 26152580.

The previous prime is 78457739. The next prime is 78457837. The reversal of 78457746 is 64775487.

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

78457746 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 78457695 and 78457704.

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 3 ways as a sum of consecutive naturals, for example, 6538140 + ... + 6538151.

It is an arithmetic number, because the mean of its divisors is an integer number (19614438).

Almost surely, 2^78457746 is an apocalyptic number.

78457746 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.

78457746 is a wasteful number, since it uses less digits than its factorization.

78457746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13076296.

The product of its digits is 1317120, while the sum is 48.

The square root of 78457746 is about 8857.6377211986. The cubic root of 78457746 is about 428.1000472146.

The spelling of 78457746 in words is "seventy-eight million, four hundred fifty-seven thousand, seven hundred forty-six".