28179774 has 96 divisors (see below), whose sum is σ = 74880000. Its totient is φ = 7480512.

The previous prime is 28179769. The next prime is 28179779. The reversal of 28179774 is 47797182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28179769) and next prime (28179779).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28179779) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189052 + ... + 189200.

It is an arithmetic number, because the mean of its divisors is an integer number (780000).

Almost surely, 2^28179774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28179774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37440000).

28179774 is an abundant number, since it is smaller than the sum of its proper divisors (46700226).

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

28179774 is a wasteful number, since it uses less digits than its factorization.

28179774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 259 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 28179774 is about 5308.4624892713. The cubic root of 28179774 is about 304.3073919244.

The spelling of 28179774 in words is "twenty-eight million, one hundred seventy-nine thousand, seven hundred seventy-four".