77704445 has 48 divisors (see below), whose sum is σ = 120734208. Its totient is φ = 47537280.

The previous prime is 77704439. The next prime is 77704447. The reversal of 77704445 is 54440777.

It is not a de Polignac number, because 77704445 - 2²² = 73510141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77704399 and 77704408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77704447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98342 + ... + 99128.

It is an arithmetic number, because the mean of its divisors is an integer number (2515296).

Almost surely, 2^77704445 is an apocalyptic number.

It is an amenable number.

77704445 is a deficient number, since it is larger than the sum of its proper divisors (43029763).

77704445 is a wasteful number, since it uses less digits than its factorization.

77704445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 843 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 38.

The square root of 77704445 is about 8815.0124787206. The cubic root of 77704445 is about 426.7255245816.

The spelling of 77704445 in words is "seventy-seven million, seven hundred four thousand, four hundred forty-five".