28229976 has 96 divisors (see below), whose sum is σ = 79999920. Its totient is φ = 8985600.

The previous prime is 28229969. The next prime is 28229983. The reversal of 28229976 is 67992282.

It is an interprime number because it is at equal distance from previous prime (28229969) and next prime (28229983).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215431 + ... + 215561.

Almost surely, 2^28229976 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 28229976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39999960).

28229976 is an abundant number, since it is smaller than the sum of its proper divisors (51769944).

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

28229976 is a wasteful number, since it uses less digits than its factorization.

28229976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 250 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 28229976 is about 5313.1888729839. The cubic root of 28229976 is about 304.4879916317.

The spelling of 28229976 in words is "twenty-eight million, two hundred twenty-nine thousand, nine hundred seventy-six".