77820104 has 16 divisors (see below), whose sum is σ = 146065920. Its totient is φ = 38869200.

The previous prime is 77820037. The next prime is 77820107. The reversal of 77820104 is 40102877.

It is not an unprimeable number, because it can be changed into a prime (77820107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3929 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (9129120).

Almost surely, 2^77820104 is an apocalyptic number.

It is an amenable number.

77820104 is a deficient number, since it is larger than the sum of its proper divisors (68245816).

77820104 is a wasteful number, since it uses less digits than its factorization.

77820104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220 (or 10216 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 77820104 is about 8821.5703817404. The cubic root of 77820104 is about 426.9371391613.

The spelling of 77820104 in words is "seventy-seven million, eight hundred twenty thousand, one hundred four".