28163949337836 has 144 divisors (see below), whose sum is σ = 80715295315200. Its totient is φ = 8208556142976.

The previous prime is 28163949337807. The next prime is 28163949337847. The reversal of 28163949337836 is 63873394936182.

28163949337836 is a `hidden beast` number, since 2 + 8 + 1 + 6 + 39 + 493 + 3 + 78 + 36 = 666.

It is a super-2 number, since 2×28163949337836² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62722755 + ... + 63170181.

Almost surely, 2^{28163949337836} is an apocalyptic number.

28163949337836 is a gapful number since it is divisible by the number (26) 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 28163949337836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40357647657600).

28163949337836 is an abundant number, since it is smaller than the sum of its proper divisors (52551345977364).

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

28163949337836 is a wasteful number, since it uses less digits than its factorization.

28163949337836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454548 (or 454543 counting only the distinct ones).

The product of its digits is 846526464, while the sum is 72.

The spelling of 28163949337836 in words is "twenty-eight trillion, one hundred sixty-three billion, nine hundred forty-nine million, three hundred thirty-seven thousand, eight hundred thirty-six".