77478934 has 32 divisors (see below), whose sum is σ = 128862720. Its totient is φ = 34718112.

The previous prime is 77478913. The next prime is 77478943. The reversal of 77478934 is 43987477.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 137337 + ... + 137899.

It is an arithmetic number, because the mean of its divisors is an integer number (4026960).

Almost surely, 2^77478934 is an apocalyptic number.

77478934 is a deficient number, since it is larger than the sum of its proper divisors (51383786).

77478934 is a wasteful number, since it uses less digits than its factorization.

77478934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its digits is 1185408, while the sum is 49.

The square root of 77478934 is about 8802.2118811126. The cubic root of 77478934 is about 426.3123155168.

The spelling of 77478934 in words is "seventy-seven million, four hundred seventy-eight thousand, nine hundred thirty-four".