28430993299969 has 16 divisors (see below), whose sum is σ = 30964814289360. Its totient is φ = 25946771558400.

The previous prime is 28430993299957. The next prime is 28430993300029. The reversal of 28430993299969 is 96999239903482.

It can be written as a sum of positive squares in 8 ways, for example, as 6108089817025 + 22322903482944 = 2471455^2 + 4724712^2 .

It is a cyclic number.

It is not a de Polignac number, because 28430993299969 - 2¹¹ = 28430993297921 is a prime.

It is a super-2 number, since 2×28430993299969² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28430993299892 and 28430993299901.

It is not an unprimeable number, because it can be changed into a prime (28430993296969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11757169 + ... + 13967569.

It is an arithmetic number, because the mean of its divisors is an integer number (1935300893085).

Almost surely, 2^{28430993299969} is an apocalyptic number.

It is an amenable number.

28430993299969 is a deficient number, since it is larger than the sum of its proper divisors (2533820989391).

28430993299969 is a wasteful number, since it uses less digits than its factorization.

28430993299969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221620.

The product of its (nonzero) digits is 3673320192, while the sum is 82.

The spelling of 28430993299969 in words is "twenty-eight trillion, four hundred thirty billion, nine hundred ninety-three million, two hundred ninety-nine thousand, nine hundred sixty-nine".