78057746 has 8 divisors (see below), whose sum is σ = 126093324. Its totient is φ = 36026640.

The previous prime is 78057739. The next prime is 78057751. The reversal of 78057746 is 64775087.

It can be written as a sum of positive squares in 2 ways, for example, as 64625521 + 13432225 = 8039^2 + 3665^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78057697 and 78057706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501085 + ... + 1501136.

Almost surely, 2^78057746 is an apocalyptic number.

78057746 is a deficient number, since it is larger than the sum of its proper divisors (48035578).

78057746 is a wasteful number, since it uses less digits than its factorization.

78057746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002236.

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 78057746 is about 8835.0294849536. The cubic root of 78057746 is about 427.3712818818.

It can be divided in two parts, 7805 and 7746, that added together give a palindrome (15551).

The spelling of 78057746 in words is "seventy-eight million, fifty-seven thousand, seven hundred forty-six".