76028221 has 4 divisors (see below), whose sum is σ = 76124412. Its totient is φ = 75932032.

The previous prime is 76028219. The next prime is 76028269. The reversal of 76028221 is 12282067.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12282067 = 7 ⋅1754581.

It can be written as a sum of positive squares in 2 ways, for example, as 60140025 + 15888196 = 7755^2 + 3986^2 .

It is a cyclic number.

It is not a de Polignac number, because 76028221 - 2¹ = 76028219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76028221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76028201) 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, 46900 + ... + 48493.

It is an arithmetic number, because the mean of its divisors is an integer number (19031103).

Almost surely, 2^76028221 is an apocalyptic number.

It is an amenable number.

76028221 is a deficient number, since it is larger than the sum of its proper divisors (96191).

76028221 is an equidigital number, since it uses as much as digits as its factorization.

76028221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96190.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 76028221 is about 8719.4163222087. The cubic root of 76028221 is about 423.6347814011.

The spelling of 76028221 in words is "seventy-six million, twenty-eight thousand, two hundred twenty-one".