77768438 has 32 divisors (see below), whose sum is σ = 135419040. Its totient is φ = 33103360.

The previous prime is 77768423. The next prime is 77768447. The reversal of 77768438 is 83486777.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100220 + ... + 100992.

It is an arithmetic number, because the mean of its divisors is an integer number (4231845).

Almost surely, 2^77768438 is an apocalyptic number.

77768438 is a deficient number, since it is larger than the sum of its proper divisors (57650602).

77768438 is a wasteful number, since it uses less digits than its factorization.

77768438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072.

The product of its digits is 1580544, while the sum is 50.

The square root of 77768438 is about 8818.6415053567. The cubic root of 77768438 is about 426.8426348002.

The spelling of 77768438 in words is "seventy-seven million, seven hundred sixty-eight thousand, four hundred thirty-eight".