28208634870 has 64 divisors (see below), whose sum is σ = 73004057280. Its totient is φ = 6934560768.

The previous prime is 28208634859. The next prime is 28208634899. The reversal of 28208634870 is 7843680282.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252882 + ... + 346938.

It is an arithmetic number, because the mean of its divisors is an integer number (1140688395).

Almost surely, 2^28208634870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28208634870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36502028640).

28208634870 is an abundant number, since it is smaller than the sum of its proper divisors (44795422410).

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

28208634870 is a wasteful number, since it uses less digits than its factorization.

28208634870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94849.

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 28208634870 in words is "twenty-eight billion, two hundred eight million, six hundred thirty-four thousand, eight hundred seventy".