76728459 has 4 divisors (see below), whose sum is σ = 102304616. Its totient is φ = 51152304.

The previous prime is 76728451. The next prime is 76728499. The reversal of 76728459 is 95482767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95482767 = 3 ⋅31827589.

It is not a de Polignac number, because 76728459 - 2³ = 76728451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76728451) 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, 12788074 + ... + 12788079.

It is an arithmetic number, because the mean of its divisors is an integer number (25576154).

Almost surely, 2^76728459 is an apocalyptic number.

76728459 is a deficient number, since it is larger than the sum of its proper divisors (25576157).

76728459 is a wasteful number, since it uses less digits than its factorization.

76728459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25576156.

The product of its digits is 846720, while the sum is 48.

The square root of 76728459 is about 8759.4782378861. The cubic root of 76728459 is about 424.9314011542.

The spelling of 76728459 in words is "seventy-six million, seven hundred twenty-eight thousand, four hundred fifty-nine".