76890845 has 8 divisors (see below), whose sum is σ = 92366520. Its totient is φ = 61447680.

The previous prime is 76890829. The next prime is 76890859. The reversal of 76890845 is 54809867.

It can be written as a sum of positive squares in 4 ways, for example, as 10484644 + 66406201 = 3238^2 + 8149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 76890845 - 2⁴ = 76890829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76890845.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2576 + ... + 12665.

It is an arithmetic number, because the mean of its divisors is an integer number (11545815).

Almost surely, 2^76890845 is an apocalyptic number.

It is an amenable number.

76890845 is a deficient number, since it is larger than the sum of its proper divisors (15475675).

76890845 is a wasteful number, since it uses less digits than its factorization.

76890845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16255.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 76890845 is about 8768.7424982149. The cubic root of 76890845 is about 425.2309609696.

The spelling of 76890845 in words is "seventy-six million, eight hundred ninety thousand, eight hundred forty-five".