28390077777 has 8 divisors (see below), whose sum is σ = 37854462240. Its totient is φ = 18926205920.

The previous prime is 28390077721. The next prime is 28390077827. The reversal of 28390077777 is 77777009382.

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 28390077777 - 2¹⁴ = 28390061393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28390077277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28402 + ... + 239972.

It is an arithmetic number, because the mean of its divisors is an integer number (4731807780).

Almost surely, 2^28390077777 is an apocalyptic number.

It is an amenable number.

28390077777 is a deficient number, since it is larger than the sum of its proper divisors (9464384463).

28390077777 is a wasteful number, since it uses less digits than its factorization.

28390077777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256303.

The product of its (nonzero) digits is 7260624, while the sum is 57.

The spelling of 28390077777 in words is "twenty-eight billion, three hundred ninety million, seventy-seven thousand, seven hundred seventy-seven".