28131624008 has 8 divisors (see below), whose sum is σ = 52746795030. Its totient is φ = 14065812000.

The previous prime is 28131623969. The next prime is 28131624091. The reversal of 28131624008 is 80042613182.

It can be written as a sum of positive squares in only one way, i.e., 27363114724 + 768509284 = 165418^2 + 27722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1758226493 + ... + 1758226508.

Almost surely, 2^28131624008 is an apocalyptic number.

It is an amenable number.

28131624008 is a deficient number, since it is larger than the sum of its proper divisors (24615171022).

28131624008 is a wasteful number, since it uses less digits than its factorization.

28131624008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516453007 (or 3516453003 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 28131624008 in words is "twenty-eight billion, one hundred thirty-one million, six hundred twenty-four thousand, eight".