77216044 has 12 divisors (see below), whose sum is σ = 136647000. Its totient is φ = 38174048.

The previous prime is 77216039. The next prime is 77216047. The reversal of 77216044 is 44061277.

It is a junction number, because it is equal to n+sod(n) for n = 77215997 and 77216015.

It is not an unprimeable number, because it can be changed into a prime (77216047) 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, 108094 + ... + 108805.

It is an arithmetic number, because the mean of its divisors is an integer number (11387250).

Almost surely, 2^77216044 is an apocalyptic number.

It is an amenable number.

77216044 is a deficient number, since it is larger than the sum of its proper divisors (59430956).

77216044 is a wasteful number, since it uses less digits than its factorization.

77216044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216992 (or 216990 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 77216044 is about 8787.2660139545. The cubic root of 77216044 is about 425.8296026249.

The spelling of 77216044 in words is "seventy-seven million, two hundred sixteen thousand, forty-four".