77455812 has 96 divisors (see below), whose sum is σ = 220372992. Its totient is φ = 20693376.

The previous prime is 77455811. The next prime is 77455813. The reversal of 77455812 is 21855477.

It is an interprime number because it is at equal distance from previous prime (77455811) and next prime (77455813).

It is not an unprimeable number, because it can be changed into a prime (77455811) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 90378 + ... + 91230.

It is an arithmetic number, because the mean of its divisors is an integer number (2295552).

Almost surely, 2^77455812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77455812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110186496).

77455812 is an abundant number, since it is smaller than the sum of its proper divisors (142917180).

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

77455812 is a wasteful number, since it uses less digits than its factorization.

77455812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 77455812 is about 8800.8983632354. The cubic root of 77455812 is about 426.2699032396.

The spelling of 77455812 in words is "seventy-seven million, four hundred fifty-five thousand, eight hundred twelve".