77688246 has 8 divisors (see below), whose sum is σ = 155376504. Its totient is φ = 25896080.

The previous prime is 77688241. The next prime is 77688257. The reversal of 77688246 is 64288677.

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

77688246 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 77688195 and 77688204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77688241) 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, 6474015 + ... + 6474026.

It is an arithmetic number, because the mean of its divisors is an integer number (19422063).

Almost surely, 2^77688246 is an apocalyptic number.

77688246 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.

77688246 is a wasteful number, since it uses less digits than its factorization.

77688246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12948046.

The product of its digits is 903168, while the sum is 48.

The square root of 77688246 is about 8814.0936005922. The cubic root of 77688246 is about 426.6958694476.

The spelling of 77688246 in words is "seventy-seven million, six hundred eighty-eight thousand, two hundred forty-six".