28968520 has 64 divisors (see below), whose sum is σ = 74954880. Its totient is φ = 9870336.

The previous prime is 28968491. The next prime is 28968551. The reversal of 28968520 is 2586982.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85792 + ... + 86128.

It is an arithmetic number, because the mean of its divisors is an integer number (1171170).

Almost surely, 2^28968520 is an apocalyptic number.

28968520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28968520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37477440).

28968520 is an abundant number, since it is smaller than the sum of its proper divisors (45986360).

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

28968520 is a wasteful number, since it uses less digits than its factorization.

28968520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 28968520 is about 5382.2411688812. The cubic root of 28968520 is about 307.1204738897.

The spelling of 28968520 in words is "twenty-eight million, nine hundred sixty-eight thousand, five hundred twenty".