28641768 has 64 divisors (see below), whose sum is σ = 74718720. Its totient is φ = 9139200.

The previous prime is 28641751. The next prime is 28641793. The reversal of 28641768 is 86714682.

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, 101788 + ... + 102068.

It is an arithmetic number, because the mean of its divisors is an integer number (1167480).

Almost surely, 2^28641768 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 28641768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37359360).

28641768 is an abundant number, since it is smaller than the sum of its proper divisors (46076952).

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

28641768 is a wasteful number, since it uses less digits than its factorization.

28641768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 454 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 28641768 is about 5351.8004447102. The cubic root of 28641768 is about 305.9613774997.

The spelling of 28641768 in words is "twenty-eight million, six hundred forty-one thousand, seven hundred sixty-eight".