77886241 has 4 divisors (see below), whose sum is σ = 77908500. Its totient is φ = 77863984.

The previous prime is 77886233. The next prime is 77886269. The reversal of 77886241 is 14268877.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14268877 = 7 ⋅2038411.

It can be written as a sum of positive squares in 2 ways, for example, as 13950225 + 63936016 = 3735^2 + 7996^2 .

It is a cyclic number.

It is not a de Polignac number, because 77886241 - 2³ = 77886233 is a prime.

It is a super-2 number, since 2×77886241² = 12132533074220162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77881241) 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, 4606 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (19477125).

Almost surely, 2^77886241 is an apocalyptic number.

It is an amenable number.

77886241 is a deficient number, since it is larger than the sum of its proper divisors (22259).

77886241 is a wasteful number, since it uses less digits than its factorization.

77886241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22258.

The product of its digits is 150528, while the sum is 43.

The square root of 77886241 is about 8825.3181812329. The cubic root of 77886241 is about 427.0580519881.

The spelling of 77886241 in words is "seventy-seven million, eight hundred eighty-six thousand, two hundred forty-one".