28538507977 has 8 divisors (see below), whose sum is σ = 32981904000. Its totient is φ = 24186728544.

The previous prime is 28538507969. The next prime is 28538507983. The reversal of 28538507977 is 77970583582.

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 28538507977 - 2³ = 28538507969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28538507917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22903477 + ... + 22904722.

It is an arithmetic number, because the mean of its divisors is an integer number (4122738000).

Almost surely, 2^28538507977 is an apocalyptic number.

It is an amenable number.

28538507977 is a deficient number, since it is larger than the sum of its proper divisors (4443396023).

28538507977 is an equidigital number, since it uses as much as digits as its factorization.

28538507977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45808295.

The product of its (nonzero) digits is 29635200, while the sum is 61.

The spelling of 28538507977 in words is "twenty-eight billion, five hundred thirty-eight million, five hundred seven thousand, nine hundred seventy-seven".