28057836395520 has 880 divisors, whose sum is σ = 105123134242368. Its totient is φ = 7142579896320.

The previous prime is 28057836395507. The next prime is 28057836395557. The reversal of 28057836395520 is 2559363875082.

28057836395520 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 78 + 3 + 6 + 3 + 9 + 552 + 0 = 666.

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 79 ways as a sum of consecutive naturals, for example, 5312975280 + ... + 5312980560.

Almost surely, 2^{28057836395520} is an apocalyptic number.

28057836395520 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 28057836395520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52561567121184).

28057836395520 is an abundant number, since it is smaller than the sum of its proper divisors (77065297846848).

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

28057836395520 is a wasteful number, since it uses less digits than its factorization.

28057836395520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5898 (or 5871 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 63.

The spelling of 28057836395520 in words is "twenty-eight trillion, fifty-seven billion, eight hundred thirty-six million, three hundred ninety-five thousand, five hundred twenty".