28928446 has 4 divisors (see below), whose sum is σ = 43392672. Its totient is φ = 14464222.

The previous prime is 28928443. The next prime is 28928447. The reversal of 28928446 is 64482982.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7232110 + ... + 7232113.

It is an arithmetic number, because the mean of its divisors is an integer number (10848168).

Almost surely, 2^28928446 is an apocalyptic number.

28928446 is a deficient number, since it is larger than the sum of its proper divisors (14464226).

28928446 is a wasteful number, since it uses less digits than its factorization.

28928446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14464225.

The product of its digits is 221184, while the sum is 43.

The square root of 28928446 is about 5378.5170818730. The cubic root of 28928446 is about 306.9787887604.

The spelling of 28928446 in words is "twenty-eight million, nine hundred twenty-eight thousand, four hundred forty-six".