76727745 has 24 divisors (see below), whose sum is σ = 134822376. Its totient is φ = 40359168.

The previous prime is 76727711. The next prime is 76727753. The reversal of 76727745 is 54772767.

It can be written as a sum of positive squares in 4 ways, for example, as 19210689 + 57517056 = 4383^2 + 7584^2 .

It is not a de Polignac number, because 76727745 - 2¹⁷ = 76596673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 76727745.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 8394 + ... + 14963.

It is an arithmetic number, because the mean of its divisors is an integer number (5617599).

Almost surely, 2^76727745 is an apocalyptic number.

It is an amenable number.

76727745 is a deficient number, since it is larger than the sum of its proper divisors (58094631).

76727745 is a wasteful number, since it uses less digits than its factorization.

76727745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23441 (or 23438 counting only the distinct ones).

The product of its digits is 576240, while the sum is 45.

The square root of 76727745 is about 8759.4374819391. The cubic root of 76727745 is about 424.9300830776.

It can be divided in two parts, 76 and 727745, that added together give a triangular number (727821 = T₁₂₀₆).

The spelling of 76727745 in words is "seventy-six million, seven hundred twenty-seven thousand, seven hundred forty-five".