77404512 has 24 divisors (see below), whose sum is σ = 203187096. Its totient is φ = 25801472.

The previous prime is 77404511. The next prime is 77404517. The reversal of 77404512 is 21540477.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 77404512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77404511) 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, 403053 + ... + 403244.

It is an arithmetic number, because the mean of its divisors is an integer number (8466129).

Almost surely, 2^77404512 is an apocalyptic number.

It is an amenable number.

77404512 is an abundant number, since it is smaller than the sum of its proper divisors (125782584).

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

77404512 is a wasteful number, since it uses less digits than its factorization.

77404512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806310 (or 806302 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 77404512 is about 8797.9834053037. The cubic root of 77404512 is about 426.1757744066.

Adding to 77404512 its reverse (21540477), we get a palindrome (98944989).

The spelling of 77404512 in words is "seventy-seven million, four hundred four thousand, five hundred twelve".