28057731144 has 16 divisors (see below), whose sum is σ = 70144327920. Its totient is φ = 9352577040.

The previous prime is 28057731133. The next prime is 28057731173. The reversal of 28057731144 is 44113775082.

It is a junction number, because it is equal to n+sod(n) for n = 28057731096 and 28057731105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584536042 + ... + 584536089.

It is an arithmetic number, because the mean of its divisors is an integer number (4384020495).

Almost surely, 2^28057731144 is an apocalyptic number.

28057731144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28057731144 is an abundant number, since it is smaller than the sum of its proper divisors (42086596776).

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

28057731144 is a wasteful number, since it uses less digits than its factorization.

28057731144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169072140 (or 1169072136 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 28057731144 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty-one thousand, one hundred forty-four".