77222872 has 8 divisors (see below), whose sum is σ = 144792900. Its totient is φ = 38611432.

The previous prime is 77222869. The next prime is 77222879. The reversal of 77222872 is 27822277.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77222879) by changing a digit.

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 as a sum of consecutive naturals, namely, 4826422 + ... + 4826437.

Almost surely, 2^77222872 is an apocalyptic number.

It is an amenable number.

77222872 is a deficient number, since it is larger than the sum of its proper divisors (67570028).

77222872 is a wasteful number, since it uses less digits than its factorization.

77222872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652865 (or 9652861 counting only the distinct ones).

The product of its digits is 43904, while the sum is 37.

The square root of 77222872 is about 8787.6545221123. The cubic root of 77222872 is about 425.8421538974.

The spelling of 77222872 in words is "seventy-seven million, two hundred twenty-two thousand, eight hundred seventy-two".