28075549653989 has 8 divisors (see below), whose sum is σ = 28834959786360. Its totient is φ = 27316171705536.

The previous prime is 28075549653971. The next prime is 28075549654067. The reversal of 28075549653989 is 98935694557082.

It can be written as a sum of positive squares in 4 ways, for example, as 14753473050625 + 13322076603364 = 3841025^2 + 3649942^2 .

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 28075549653989 - 2³² = 28071254686693 is a prime.

It is a super-2 number, since 2×28075549653989² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075549653689) 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, 6272474 + ... + 9772155.

It is an arithmetic number, because the mean of its divisors is an integer number (3604369973295).

Almost surely, 2^{28075549653989} is an apocalyptic number.

It is an amenable number.

28075549653989 is a deficient number, since it is larger than the sum of its proper divisors (759410132371).

28075549653989 is a wasteful number, since it uses less digits than its factorization.

28075549653989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16091959.

The product of its (nonzero) digits is 5878656000, while the sum is 80.

The spelling of 28075549653989 in words is "twenty-eight trillion, seventy-five billion, five hundred forty-nine million, six hundred fifty-three thousand, nine hundred eighty-nine".