77996416 has 32 divisors (see below), whose sum is σ = 156053880. Its totient is φ = 38830080.

The previous prime is 77996393. The next prime is 77996419. The reversal of 77996416 is 61469977.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 77996416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77996419) 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, 31711 + ... + 34081.

Almost surely, 2^77996416 is an apocalyptic number.

It is an amenable number.

77996416 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

77996416 is a wasteful number, since it uses less digits than its factorization.

77996416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642 (or 2630 counting only the distinct ones).

The product of its digits is 571536, while the sum is 49.

The square root of 77996416 is about 8831.5579599525. The cubic root of 77996416 is about 427.2593239633.

The spelling of 77996416 in words is "seventy-seven million, nine hundred ninety-six thousand, four hundred sixteen".