77685434 has 16 divisors (see below), whose sum is σ = 119683872. Its totient is φ = 37797648.

The previous prime is 77685409. The next prime is 77685449. The reversal of 77685434 is 43458677.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23657 + ... + 26739.

It is an arithmetic number, because the mean of its divisors is an integer number (7480242).

Almost surely, 2^77685434 is an apocalyptic number.

77685434 is a deficient number, since it is larger than the sum of its proper divisors (41998438).

77685434 is a wasteful number, since it uses less digits than its factorization.

77685434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421.

The product of its digits is 564480, while the sum is 44.

The square root of 77685434 is about 8813.9340818956. The cubic root of 77685434 is about 426.6907211645.

The spelling of 77685434 in words is "seventy-seven million, six hundred eighty-five thousand, four hundred thirty-four".