77538434 has 16 divisors (see below), whose sum is σ = 118456128. Its totient is φ = 38059152.

The previous prime is 77538403. The next prime is 77538437. The reversal of 77538434 is 43483577.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77538391 and 77538400.

It is not an unprimeable number, because it can be changed into a prime (77538437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26324 + ... + 29120.

It is an arithmetic number, because the mean of its divisors is an integer number (7403508).

Almost surely, 2^77538434 is an apocalyptic number.

77538434 is a deficient number, since it is larger than the sum of its proper divisors (40917694).

77538434 is a wasteful number, since it uses less digits than its factorization.

77538434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049.

The product of its digits is 282240, while the sum is 41.

The square root of 77538434 is about 8805.5910647724. The cubic root of 77538434 is about 426.4214165376.

The spelling of 77538434 in words is "seventy-seven million, five hundred thirty-eight thousand, four hundred thirty-four".