77222836 has 6 divisors (see below), whose sum is σ = 135139970. Its totient is φ = 38611416.

The previous prime is 77222791. The next prime is 77222837. The reversal of 77222836 is 63822277.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48385936 + 28836900 = 6956^2 + 5370^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77222795 and 77222804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77222837) 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, 9652851 + ... + 9652858.

Almost surely, 2^77222836 is an apocalyptic number.

It is an amenable number.

77222836 is a deficient number, since it is larger than the sum of its proper divisors (57917134).

77222836 is a wasteful number, since it uses less digits than its factorization.

77222836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19305713 (or 19305711 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 77222836 is about 8787.6524737839. The cubic root of 77222836 is about 425.8420877239.

The spelling of 77222836 in words is "seventy-seven million, two hundred twenty-two thousand, eight hundred thirty-six".