77144072 has 16 divisors (see below), whose sum is σ = 144776700. Its totient is φ = 38536960.

The previous prime is 77144071. The next prime is 77144087. The reversal of 77144072 is 27044177.

It can be written as a sum of positive squares in 2 ways, for example, as 66814276 + 10329796 = 8174^2 + 3214^2 .

It is not an unprimeable number, because it can be changed into a prime (77144071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6572 + ... + 14052.

Almost surely, 2^77144072 is an apocalyptic number.

It is an amenable number.

77144072 is a deficient number, since it is larger than the sum of its proper divisors (67632628).

77144072 is a wasteful number, since it uses less digits than its factorization.

77144072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8776 (or 8772 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 77144072 is about 8783.1698150497. The cubic root of 77144072 is about 425.6972582155.

The spelling of 77144072 in words is "seventy-seven million, one hundred forty-four thousand, seventy-two".