77704340 has 48 divisors (see below), whose sum is σ = 192931200. Its totient is φ = 25721472.

The previous prime is 77704313. The next prime is 77704349. The reversal of 77704340 is 4340777.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77704297 and 77704306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77704349) 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 15 ways as a sum of consecutive naturals, for example, 5510 + ... + 13629.

It is an arithmetic number, because the mean of its divisors is an integer number (4019400).

Almost surely, 2^77704340 is an apocalyptic number.

77704340 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77704340 is an abundant number, since it is smaller than the sum of its proper divisors (115226860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77704340 is a wasteful number, since it uses less digits than its factorization.

77704340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19184 (or 19182 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 77704340 is about 8815.0065229698. The cubic root of 77704340 is about 426.7253323738.

The spelling of 77704340 in words is "seventy-seven million, seven hundred four thousand, three hundred forty".