28672401577 has 8 divisors (see below), whose sum is σ = 29220254280. Its totient is φ = 28124803200.

The previous prime is 28672401551. The next prime is 28672401599. The reversal of 28672401577 is 77510427682.

It can be written as a sum of positive squares in 4 ways, for example, as 8096220441 + 20576181136 = 89979^2 + 143444^2 .

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 28672401577 - 2⁷ = 28672401449 is a prime.

It is a super-2 number, since 2×28672401577² (a number of 22 digits) contains 22 as substring.

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 28672401577.

It is not an unprimeable number, because it can be changed into a prime (28672401517) 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, 172327 + ... + 295027.

It is an arithmetic number, because the mean of its divisors is an integer number (3652531785).

Almost surely, 2^28672401577 is an apocalyptic number.

It is an amenable number.

28672401577 is a deficient number, since it is larger than the sum of its proper divisors (547852703).

28672401577 is a wasteful number, since it uses less digits than its factorization.

28672401577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127163.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 28672401577 in words is "twenty-eight billion, six hundred seventy-two million, four hundred one thousand, five hundred seventy-seven".