77743438 has 16 divisors (see below), whose sum is σ = 121461984. Its totient is φ = 37285920.

The previous prime is 77743433. The next prime is 77743453. The reversal of 77743438 is 83434777.

It is a junction number, because it is equal to n+sod(n) for n = 77743394 and 77743403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77743433) 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, 2145 + ... + 12652.

It is an arithmetic number, because the mean of its divisors is an integer number (7591374).

Almost surely, 2^77743438 is an apocalyptic number.

77743438 is a deficient number, since it is larger than the sum of its proper divisors (43718546).

77743438 is a wasteful number, since it uses less digits than its factorization.

77743438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907.

The product of its digits is 395136, while the sum is 43.

The square root of 77743438 is about 8817.2239395402. The cubic root of 77743438 is about 426.7968912663.

The spelling of 77743438 in words is "seventy-seven million, seven hundred forty-three thousand, four hundred thirty-eight".