28431894260 has 192 divisors, whose sum is σ = 76207219200. Its totient is φ = 8832983040.

The previous prime is 28431894223. The next prime is 28431894289. The reversal of 28431894260 is 6249813482.

It is a super-2 number, since 2×28431894260² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43540094 + ... + 43540746.

It is an arithmetic number, because the mean of its divisors is an integer number (396912600).

Almost surely, 2^28431894260 is an apocalyptic number.

28431894260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28431894260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38103609600).

28431894260 is an abundant number, since it is smaller than the sum of its proper divisors (47775324940).

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

28431894260 is a wasteful number, since it uses less digits than its factorization.

28431894260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 28431894260 in words is "twenty-eight billion, four hundred thirty-one million, eight hundred ninety-four thousand, two hundred sixty".