28429616858 has 8 divisors (see below), whose sum is σ = 42660363252. Its totient is φ = 14209495776.

The previous prime is 28429616827. The next prime is 28429616861. The reversal of 28429616858 is 85861692482.

It can be written as a sum of positive squares in 2 ways, for example, as 28423599649 + 6017209 = 168593^2 + 2453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28429616858² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28429616797 and 28429616806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2649635 + ... + 2660342.

Almost surely, 2^28429616858 is an apocalyptic number.

28429616858 is a deficient number, since it is larger than the sum of its proper divisors (14230746394).

28429616858 is a wasteful number, since it uses less digits than its factorization.

28429616858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312656.

The product of its digits is 13271040, while the sum is 59.

The spelling of 28429616858 in words is "twenty-eight billion, four hundred twenty-nine million, six hundred sixteen thousand, eight hundred fifty-eight".