77209768 has 32 divisors (see below), whose sum is σ = 155944800. Its totient is φ = 35719488.

The previous prime is 77209757. The next prime is 77209789. The reversal of 77209768 is 86790277.

It is a super-2 number, since 2×77209768² = 11922696549227648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630 + ... + 12442.

It is an arithmetic number, because the mean of its divisors is an integer number (4873275).

Almost surely, 2^77209768 is an apocalyptic number.

It is an amenable number.

77209768 is an abundant number, since it is smaller than the sum of its proper divisors (78735032).

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

77209768 is a wasteful number, since it uses less digits than its factorization.

77209768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11881 (or 11877 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 77209768 is about 8786.9088990384. The cubic root of 77209768 is about 425.8180653897.

It can be divided in two parts, 77209 and 768, that added together give a palindrome (77977).

The spelling of 77209768 in words is "seventy-seven million, two hundred nine thousand, seven hundred sixty-eight".