76745728 has 44 divisors (see below), whose sum is σ = 154753200. Its totient is φ = 38039552.

The previous prime is 76745707. The next prime is 76745729. The reversal of 76745728 is 82754767.

Its product of digits (658560) is a multiple of the sum of its prime factors (672).

It is not an unprimeable number, because it can be changed into a prime (76745729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152325 + ... + 152827.

Almost surely, 2^76745728 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 76745728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77376600).

76745728 is an abundant number, since it is smaller than the sum of its proper divisors (78007472).

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

76745728 is a wasteful number, since it uses less digits than its factorization.

76745728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 654 counting only the distinct ones).

The product of its digits is 658560, while the sum is 46.

The square root of 76745728 is about 8760.4639146566. The cubic root of 76745728 is about 424.9632780267.

The spelling of 76745728 in words is "seventy-six million, seven hundred forty-five thousand, seven hundred twenty-eight".