28380077 has 8 divisors (see below), whose sum is σ = 31715712. Its totient is φ = 25170400.

The previous prime is 28380019. The next prime is 28380083. The reversal of 28380077 is 77008382.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28380077 - 2¹⁰ = 28379053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380377) by changing a digit.

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, 31013 + ... + 31914.

It is an arithmetic number, because the mean of its divisors is an integer number (3964464).

Almost surely, 2^28380077 is an apocalyptic number.

It is an amenable number.

28380077 is a deficient number, since it is larger than the sum of its proper divisors (3335635).

28380077 is a wasteful number, since it uses less digits than its factorization.

28380077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62979.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28380077 is about 5327.2954676834. The cubic root of 28380077 is about 305.0267001619.

The spelling of 28380077 in words is "twenty-eight million, three hundred eighty thousand, seventy-seven".