28908086650155 has 36 divisors (see below), whose sum is σ = 52883380704960. Its totient is φ = 14606191141344.

The previous prime is 28908086650139. The next prime is 28908086650159. The reversal of 28908086650155 is 55105668080982.

28908086650155 is a `hidden beast` number, since 289 + 0 + 80 + 86 + 6 + 50 + 155 = 666.

It is not a de Polignac number, because 28908086650155 - 2⁴ = 28908086650139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28908086650092 and 28908086650101.

It is not an unprimeable number, because it can be changed into a prime (28908086650159) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 889737115 + ... + 889769604.

It is an arithmetic number, because the mean of its divisors is an integer number (1468982797360).

Almost surely, 2^{28908086650155} is an apocalyptic number.

28908086650155 is a deficient number, since it is larger than the sum of its proper divisors (23975294054805).

28908086650155 is a wasteful number, since it uses less digits than its factorization.

28908086650155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779506768 (or 1779506746 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 63.

The spelling of 28908086650155 in words is "twenty-eight trillion, nine hundred eight billion, eighty-six million, six hundred fifty thousand, one hundred fifty-five".