28074172 has 48 divisors (see below), whose sum is σ = 59754240. Its totient is φ = 11273472.

The previous prime is 28074161. The next prime is 28074173. The reversal of 28074172 is 27147082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28074173) 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, 59883 + ... + 60349.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^28074172 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 28074172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29877120).

28074172 is an abundant number, since it is smaller than the sum of its proper divisors (31680068).

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

28074172 is a wasteful number, since it uses less digits than its factorization.

28074172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 28074172 is about 5298.5065820474. The cubic root of 28074172 is about 303.9267915821.

The spelling of 28074172 in words is "twenty-eight million, seventy-four thousand, one hundred seventy-two".