28230077 has 4 divisors (see below), whose sum is σ = 28249056. Its totient is φ = 28211100.

The previous prime is 28230071. The next prime is 28230089. The reversal of 28230077 is 77003282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28230077 - 2⁴ = 28230061 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 (28230071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7049 + ... + 10302.

It is an arithmetic number, because the mean of its divisors is an integer number (7062264).

Almost surely, 2^28230077 is an apocalyptic number.

It is an amenable number.

28230077 is a deficient number, since it is larger than the sum of its proper divisors (18979).

28230077 is a wasteful number, since it uses less digits than its factorization.

28230077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 28230077 is about 5313.1983776253. The cubic root of 28230077 is about 304.4883547593.

The spelling of 28230077 in words is "twenty-eight million, two hundred thirty thousand, seventy-seven".