28861549266 has 32 divisors (see below), whose sum is σ = 64506528576. Its totient is φ = 8532608000.

The previous prime is 28861549261. The next prime is 28861549267. The reversal of 28861549266 is 66294516882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28861549261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5330175 + ... + 5335586.

It is an arithmetic number, because the mean of its divisors is an integer number (2015829018).

Almost surely, 2^28861549266 is an apocalyptic number.

28861549266 is an abundant number, since it is smaller than the sum of its proper divisors (35644979310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28861549266 is a wasteful number, since it uses less digits than its factorization.

28861549266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10665818.

The product of its digits is 9953280, while the sum is 57.

The spelling of 28861549266 in words is "twenty-eight billion, eight hundred sixty-one million, five hundred forty-nine thousand, two hundred sixty-six".