28968156 has 72 divisors (see below), whose sum is σ = 84389760. Its totient is φ = 8207136.

The previous prime is 28968143. The next prime is 28968169. The reversal of 28968156 is 65186982.

It is an interprime number because it is at equal distance from previous prime (28968143) and next prime (28968169).

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, 34615 + ... + 35441.

It is an arithmetic number, because the mean of its divisors is an integer number (1172080).

Almost surely, 2^28968156 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 28968156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42194880).

28968156 is an abundant number, since it is smaller than the sum of its proper divisors (55421604).

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

28968156 is a wasteful number, since it uses less digits than its factorization.

28968156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 978 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28968156 is about 5382.2073538651. The cubic root of 28968156 is about 307.1191875241.

The spelling of 28968156 in words is "twenty-eight million, nine hundred sixty-eight thousand, one hundred fifty-six".