28169652429 has 24 divisors (see below), whose sum is σ = 41567041152. Its totient is φ = 18374976000.

The previous prime is 28169652421. The next prime is 28169652457. The reversal of 28169652429 is 92425696182.

28169652429 is a `hidden beast` number, since 2 + 8 + 1 + 6 + 96 + 524 + 29 = 666.

It is not a de Polignac number, because 28169652429 - 2³ = 28169652421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28169652421) 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 23 ways as a sum of consecutive naturals, for example, 1969554 + ... + 1983804.

It is an arithmetic number, because the mean of its divisors is an integer number (1731960048).

Almost surely, 2^28169652429 is an apocalyptic number.

It is an amenable number.

28169652429 is a deficient number, since it is larger than the sum of its proper divisors (13397388723).

28169652429 is a wasteful number, since it uses less digits than its factorization.

28169652429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18977 (or 18974 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 28169652429 in words is "twenty-eight billion, one hundred sixty-nine million, six hundred fifty-two thousand, four hundred twenty-nine".