77764242 has 32 divisors (see below), whose sum is σ = 165058560. Its totient is φ = 24371600.

The previous prime is 77764187. The next prime is 77764319. The reversal of 77764242 is 24246777.

It is a self number, because there is not a number n which added to its sum of digits gives 77764242.

It is an unprimeable number.

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, 3367 + ... + 12917.

It is an arithmetic number, because the mean of its divisors is an integer number (5158080).

Almost surely, 2^77764242 is an apocalyptic number.

77764242 is an abundant number, since it is smaller than the sum of its proper divisors (87294318).

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

77764242 is a wasteful number, since it uses less digits than its factorization.

77764242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638.

The product of its digits is 131712, while the sum is 39.

The square root of 77764242 is about 8818.4035970237. The cubic root of 77764242 is about 426.8349578902.

The spelling of 77764242 in words is "seventy-seven million, seven hundred sixty-four thousand, two hundred forty-two".