77945444 has 12 divisors (see below), whose sum is σ = 137007024. Its totient is φ = 38800584.

The previous prime is 77945443. The next prime is 77945447. The reversal of 77945444 is 44454977.

It is a junction number, because it is equal to n+sod(n) for n = 77945395 and 77945404.

It is not an unprimeable number, because it can be changed into a prime (77945443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42014 + ... + 43829.

It is an arithmetic number, because the mean of its divisors is an integer number (11417252).

Almost surely, 2^77945444 is an apocalyptic number.

It is an amenable number.

77945444 is a deficient number, since it is larger than the sum of its proper divisors (59061580).

77945444 is a wasteful number, since it uses less digits than its factorization.

77945444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86074 (or 86072 counting only the distinct ones).

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

The square root of 77945444 is about 8828.6717007713. The cubic root of 77945444 is about 427.1662299073.

The spelling of 77945444 in words is "seventy-seven million, nine hundred forty-five thousand, four hundred forty-four".