77724104 has 8 divisors (see below), whose sum is σ = 145732710. Its totient is φ = 38862048.

The previous prime is 77724103. The next prime is 77724131. The reversal of 77724104 is 40142777.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 3247204 = 8630^2 + 1802^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77724103) 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, 4857749 + ... + 4857764.

Almost surely, 2^77724104 is an apocalyptic number.

It is an amenable number.

77724104 is a deficient number, since it is larger than the sum of its proper divisors (68008606).

77724104 is a wasteful number, since it uses less digits than its factorization.

77724104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9715519 (or 9715515 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 77724104 is about 8816.1274945409. The cubic root of 77724104 is about 426.7615083219.

The spelling of 77724104 in words is "seventy-seven million, seven hundred twenty-four thousand, one hundred four".