77217448 has 32 divisors (see below), whose sum is σ = 180509760. Its totient is φ = 30084480.

The previous prime is 77217421. The next prime is 77217457. The reversal of 77217448 is 84471277.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77217448.

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 7 ways as a sum of consecutive naturals, for example, 62061 + ... + 63292.

It is an arithmetic number, because the mean of its divisors is an integer number (5640930).

Almost surely, 2^77217448 is an apocalyptic number.

It is an amenable number.

77217448 is an abundant number, since it is smaller than the sum of its proper divisors (103292312).

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

77217448 is a wasteful number, since it uses less digits than its factorization.

77217448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125377 (or 125373 counting only the distinct ones).

The product of its digits is 87808, while the sum is 40.

The square root of 77217448 is about 8787.3459019206. The cubic root of 77217448 is about 425.8321835270.

The spelling of 77217448 in words is "seventy-seven million, two hundred seventeen thousand, four hundred forty-eight".