77942768 has 20 divisors (see below), whose sum is σ = 157580688. Its totient is φ = 37276800.

The previous prime is 77942747. The next prime is 77942783. The reversal of 77942768 is 86724977.

It is a congruent number.

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, 105533 + ... + 106268.

Almost surely, 2^77942768 is an apocalyptic number.

It is an amenable number.

77942768 is an abundant number, since it is smaller than the sum of its proper divisors (79637920).

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

77942768 is a wasteful number, since it uses less digits than its factorization.

77942768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211832 (or 211826 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 77942768 is about 8828.5201477937. The cubic root of 77942768 is about 427.1613414030.

The spelling of 77942768 in words is "seventy-seven million, nine hundred forty-two thousand, seven hundred sixty-eight".