28210194500929 has 27 divisors (see below), whose sum is σ = 34860621003177. Its totient is φ = 22757294079744.

The previous prime is 28210194500909. The next prime is 28210194500947. The reversal of 28210194500929 is 92900549101282.

It is a happy number.

The square root of 28210194500929 is 5311327.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 12510531702529 + 15699662798400 = 3537023^2 + 3962280^2 .

It is not a de Polignac number, because 28210194500929 - 2²³ = 28210186112321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28210194500909) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 632025597 + ... + 632070229.

Almost surely, 2^{28210194500929} is an apocalyptic number.

28210194500929 is the 5311327-th square number.

28210194500929 is the 2655664-th centered octagonal number.

It is an amenable number.

28210194500929 is a deficient number, since it is larger than the sum of its proper divisors (6650426502248).

28210194500929 is an frugal number, since it uses more digits than its factorization.

28210194500929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89314 (or 44657 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 28210194500929 in words is "twenty-eight trillion, two hundred ten billion, one hundred ninety-four million, five hundred thousand, nine hundred twenty-nine".