77442716 has 12 divisors (see below), whose sum is σ = 145949832. Its totient is φ = 35742768.

The previous prime is 77442709. The next prime is 77442719. The reversal of 77442716 is 61724477.

It is a super-2 number, since 2×77442716² = 11994748522913312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77442716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77442719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744590 + ... + 744693.

It is an arithmetic number, because the mean of its divisors is an integer number (12162486).

Almost surely, 2^77442716 is an apocalyptic number.

It is an amenable number.

77442716 is a deficient number, since it is larger than the sum of its proper divisors (68507116).

77442716 is a wasteful number, since it uses less digits than its factorization.

77442716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489300 (or 1489298 counting only the distinct ones).

The product of its digits is 65856, while the sum is 38.

The square root of 77442716 is about 8800.1543168288. The cubic root of 77442716 is about 426.2458777332.

The spelling of 77442716 in words is "seventy-seven million, four hundred forty-two thousand, seven hundred sixteen".