28571103444 has 48 divisors (see below), whose sum is σ = 71804882240. Its totient is φ = 8789783040.

The previous prime is 28571103443. The next prime is 28571103461. The reversal of 28571103444 is 44430117582.

It is a super-2 number, since 2×28571103444² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571103443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716924 + ... + 1733484.

Almost surely, 2^28571103444 is an apocalyptic number.

It is an amenable number.

28571103444 is an abundant number, since it is smaller than the sum of its proper divisors (43233778796).

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

28571103444 is a wasteful number, since it uses less digits than its factorization.

28571103444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27640 (or 27638 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 28571103444 in words is "twenty-eight billion, five hundred seventy-one million, one hundred three thousand, four hundred forty-four".