28317646154 has 12 divisors (see below), whose sum is σ = 49411403154. Its totient is φ = 12136134024.

The previous prime is 28317646121. The next prime is 28317646157. The reversal of 28317646154 is 45164671382.

It can be written as a sum of positive squares in only one way, i.e., 28015060129 + 302586025 = 167377^2 + 17395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28317646099 and 28317646108.

It is not an unprimeable number, because it can be changed into a prime (28317646157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144477689 + ... + 144477884.

Almost surely, 2^28317646154 is an apocalyptic number.

28317646154 is a deficient number, since it is larger than the sum of its proper divisors (21093757000).

28317646154 is a wasteful number, since it uses less digits than its factorization.

28317646154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288955589 (or 288955582 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The spelling of 28317646154 in words is "twenty-eight billion, three hundred seventeen million, six hundred forty-six thousand, one hundred fifty-four".