28391401206 has 192 divisors, whose sum is σ = 77033349120. Its totient is φ = 7655899680.

The previous prime is 28391401201. The next prime is 28391401217. The reversal of 28391401206 is 60210419382.

28391401206 is a `hidden beast` number, since 28 + 391 + 40 + 1 + 206 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28391401201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21394515 + ... + 21395841.

It is an arithmetic number, because the mean of its divisors is an integer number (401215360).

Almost surely, 2^28391401206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28391401206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38516674560).

28391401206 is an abundant number, since it is smaller than the sum of its proper divisors (48641947914).

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

28391401206 is a wasteful number, since it uses less digits than its factorization.

28391401206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1689 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 28391401206 in words is "twenty-eight billion, three hundred ninety-one million, four hundred one thousand, two hundred six".