77744748 has 12 divisors (see below), whose sum is σ = 181404440. Its totient is φ = 25914912.

The previous prime is 77744747. The next prime is 77744767. The reversal of 77744748 is 84744777.

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

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77744697 and 77744706.

It is not an unprimeable number, because it can be changed into a prime (77744741) 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, 3239353 + ... + 3239376.

Almost surely, 2^77744748 is an apocalyptic number.

It is an amenable number.

77744748 is an abundant number, since it is smaller than the sum of its proper divisors (103659692).

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

77744748 is a wasteful number, since it uses less digits than its factorization.

77744748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6478736 (or 6478734 counting only the distinct ones).

The product of its digits is 1229312, while the sum is 48.

The square root of 77744748 is about 8817.2982256471. The cubic root of 77744748 is about 426.7992884709.

The spelling of 77744748 in words is "seventy-seven million, seven hundred forty-four thousand, seven hundred forty-eight".