28101944 has 64 divisors (see below), whose sum is σ = 59690400. Its totient is φ = 12317184.

The previous prime is 28101943. The next prime is 28101949. The reversal of 28101944 is 44910182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28101943) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 257762 + ... + 257870.

Almost surely, 2^28101944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28101944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29845200).

28101944 is an abundant number, since it is smaller than the sum of its proper divisors (31588456).

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

28101944 is a wasteful number, since it uses less digits than its factorization.

28101944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28101944 is about 5301.1266726989. The cubic root of 28101944 is about 304.0269770612.

The spelling of 28101944 in words is "twenty-eight million, one hundred one thousand, nine hundred forty-four".