28013944 has 16 divisors (see below), whose sum is σ = 60030000. Its totient is φ = 12005952.

The previous prime is 28013939. The next prime is 28013959. The reversal of 28013944 is 44931082.

It is a congruent number.

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, 250069 + ... + 250180.

It is an arithmetic number, because the mean of its divisors is an integer number (3751875).

Almost surely, 2^28013944 is an apocalyptic number.

It is an amenable number.

28013944 is an abundant number, since it is smaller than the sum of its proper divisors (32016056).

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

28013944 is a wasteful number, since it uses less digits than its factorization.

28013944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500262 (or 500258 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28013944 is about 5292.8200422837. The cubic root of 28013944 is about 303.7092961992.

The spelling of 28013944 in words is "twenty-eight million, thirteen thousand, nine hundred forty-four".