77136448 has 14 divisors (see below), whose sum is σ = 153067766. Its totient is φ = 38568192.

The previous prime is 77136443. The next prime is 77136487. The reversal of 77136448 is 84463177.

It can be written as a sum of positive squares in only one way, i.e., 50013184 + 27123264 = 7072^2 + 5208^2 .

It is a super-2 number, since 2×77136448² = 11900063220113408, 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 77136448.

It is not an unprimeable number, because it can be changed into a prime (77136443) 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 as a sum of consecutive naturals, namely, 602565 + ... + 602692.

Almost surely, 2^77136448 is an apocalyptic number.

It is an amenable number.

77136448 is a deficient number, since it is larger than the sum of its proper divisors (75931318).

77136448 is a wasteful number, since it uses less digits than its factorization.

77136448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205269 (or 1205259 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 77136448 is about 8782.7357924510. The cubic root of 77136448 is about 425.6832341402.

It can be divided in two parts, 7713 and 6448, that added together give a square (14161 = 119²).

The spelling of 77136448 in words is "seventy-seven million, one hundred thirty-six thousand, four hundred forty-eight".