77738748 has 12 divisors (see below), whose sum is σ = 181390440. Its totient is φ = 25912912.

The previous prime is 77738737. The next prime is 77738777. The reversal of 77738748 is 84783777.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 77738748.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3239103 + ... + 3239126.

It is an arithmetic number, because the mean of its divisors is an integer number (15115870).

Almost surely, 2^77738748 is an apocalyptic number.

It is an amenable number.

77738748 is an abundant number, since it is smaller than the sum of its proper divisors (103651692).

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

77738748 is a wasteful number, since it uses less digits than its factorization.

77738748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6478236 (or 6478234 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 51.

The square root of 77738748 is about 8816.9579788043. The cubic root of 77738748 is about 426.7883086870.

The spelling of 77738748 in words is "seventy-seven million, seven hundred thirty-eight thousand, seven hundred forty-eight".