77628763 has 4 divisors (see below), whose sum is σ = 77915488. Its totient is φ = 77342040.

The previous prime is 77628697. The next prime is 77628767. The reversal of 77628763 is 36782677.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77628763 - 2²¹ = 75531611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77628767) 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, 142956 + ... + 143497.

It is an arithmetic number, because the mean of its divisors is an integer number (19478872).

Almost surely, 2^77628763 is an apocalyptic number.

77628763 is a deficient number, since it is larger than the sum of its proper divisors (286725).

77628763 is a wasteful number, since it uses less digits than its factorization.

77628763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286724.

The product of its digits is 592704, while the sum is 46.

The square root of 77628763 is about 8810.7186426534. The cubic root of 77628763 is about 426.5869399236.

The spelling of 77628763 in words is "seventy-seven million, six hundred twenty-eight thousand, seven hundred sixty-three".