28456738 has 8 divisors (see below), whose sum is σ = 42716880. Its totient is φ = 14217780.

The previous prime is 28456717. The next prime is 28456741. The reversal of 28456738 is 83765482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28456694 and 28456703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348 + ... + 7663.

It is an arithmetic number, because the mean of its divisors is an integer number (5339610).

Almost surely, 2^28456738 is an apocalyptic number.

28456738 is a deficient number, since it is larger than the sum of its proper divisors (14260142).

28456738 is a wasteful number, since it uses less digits than its factorization.

28456738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10592.

The product of its digits is 322560, while the sum is 43.

The square root of 28456738 is about 5334.4857296650. The cubic root of 28456738 is about 305.3011019140.

The spelling of 28456738 in words is "twenty-eight million, four hundred fifty-six thousand, seven hundred thirty-eight".