28724016 has 40 divisors (see below), whose sum is σ = 78570864. Its totient is φ = 9011200.

The previous prime is 28724009. The next prime is 28724027. The reversal of 28724016 is 61042782.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16785 + ... + 18416.

Almost surely, 2^28724016 is an apocalyptic number.

It is an amenable number.

28724016 is an abundant number, since it is smaller than the sum of its proper divisors (49846848).

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

28724016 is a wasteful number, since it uses less digits than its factorization.

28724016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35229 (or 35223 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28724016 is about 5359.4790791643. The cubic root of 28724016 is about 306.2539649077.

Adding to 28724016 its reverse (61042782), we get a palindrome (89766798).

The spelling of 28724016 in words is "twenty-eight million, seven hundred twenty-four thousand, sixteen".