77444444 has 24 divisors (see below), whose sum is σ = 168970368. Its totient is φ = 30173040.

The previous prime is 77444431. The next prime is 77444453. The reversal of 77444444 is 44444477.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 77444398 and 77444407.

It is a congruent 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, 125414 + ... + 126029.

It is an arithmetic number, because the mean of its divisors is an integer number (7040432).

Almost surely, 2^77444444 is an apocalyptic number.

It is an amenable number.

77444444 is an abundant number, since it is smaller than the sum of its proper divisors (91525924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77444444 is a wasteful number, since it uses less digits than its factorization.

77444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251465 (or 251463 counting only the distinct ones).

The product of its digits is 200704, while the sum is 38.

The square root of 77444444 is about 8800.2524963776. The cubic root of 77444444 is about 426.2490480223.

The spelling of 77444444 in words is "seventy-seven million, four hundred forty-four thousand, four hundred forty-four".