28371444 has 12 divisors (see below), whose sum is σ = 66200064. Its totient is φ = 9457144.

The previous prime is 28371439. The next prime is 28371449. The reversal of 28371444 is 44417382.

It is an interprime number because it is at equal distance from previous prime (28371439) and next prime (28371449).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182132 + ... + 1182155.

It is an arithmetic number, because the mean of its divisors is an integer number (5516672).

Almost surely, 2^28371444 is an apocalyptic number.

It is an amenable number.

28371444 is an abundant number, since it is smaller than the sum of its proper divisors (37828620).

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

28371444 is a wasteful number, since it uses less digits than its factorization.

28371444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364294 (or 2364292 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 28371444 is about 5326.4851450089. The cubic root of 28371444 is about 304.9957681040.

The spelling of 28371444 in words is "twenty-eight million, three hundred seventy-one thousand, four hundred forty-four".