77780434 has 16 divisors (see below), whose sum is σ = 123565248. Its totient is φ = 36642672.

The previous prime is 77780431. The next prime is 77780449. The reversal of 77780434 is 43408777.

It is not an unprimeable number, because it can be changed into a prime (77780431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9537 + ... + 15700.

It is an arithmetic number, because the mean of its divisors is an integer number (7722828).

Almost surely, 2^77780434 is an apocalyptic number.

77780434 is a deficient number, since it is larger than the sum of its proper divisors (45784814).

77780434 is a wasteful number, since it uses less digits than its factorization.

77780434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25329.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 77780434 is about 8819.3216292411. The cubic root of 77780434 is about 426.8645808969.

The spelling of 77780434 in words is "seventy-seven million, seven hundred eighty thousand, four hundred thirty-four".