28057620486 has 64 divisors (see below), whose sum is σ = 65671372800. Its totient is φ = 7824279456.

The previous prime is 28057620467. The next prime is 28057620497. The reversal of 28057620486 is 68402675082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2846755 + ... + 2856593.

It is an arithmetic number, because the mean of its divisors is an integer number (1026115200).

Almost surely, 2^28057620486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28057620486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32835686400).

28057620486 is an abundant number, since it is smaller than the sum of its proper divisors (37613752314).

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

28057620486 is a wasteful number, since it uses less digits than its factorization.

28057620486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11473.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 28057620486 in words is "twenty-eight billion, fifty-seven million, six hundred twenty thousand, four hundred eighty-six".