28177044 has 48 divisors (see below), whose sum is σ = 76003200. Its totient is φ = 7958016.

The previous prime is 28177027. The next prime is 28177049. The reversal of 28177044 is 44077182.

It is a junction number, because it is equal to n+sod(n) for n = 28176996 and 28177014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28177049) 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, 5592 + ... + 9360.

It is an arithmetic number, because the mean of its divisors is an integer number (1583400).

Almost surely, 2^28177044 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 28177044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38001600).

28177044 is an abundant number, since it is smaller than the sum of its proper divisors (47826156).

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

28177044 is a wasteful number, since it uses less digits than its factorization.

28177044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3872 (or 3870 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 28177044 is about 5308.2053464424. The cubic root of 28177044 is about 304.2975647104.

The spelling of 28177044 in words is "twenty-eight million, one hundred seventy-seven thousand, forty-four".