28272742 has 8 divisors (see below), whose sum is σ = 42554736. Its totient is φ = 14087832.

The previous prime is 28272737. The next prime is 28272781. The reversal of 28272742 is 24727282.

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 = 28272698 and 28272707.

It is a congruent number.

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, 23538 + ... + 24709.

It is an arithmetic number, because the mean of its divisors is an integer number (5319342).

Almost surely, 2^28272742 is an apocalyptic number.

28272742 is a deficient number, since it is larger than the sum of its proper divisors (14281994).

28272742 is a wasteful number, since it uses less digits than its factorization.

28272742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48542.

The product of its digits is 25088, while the sum is 34.

The square root of 28272742 is about 5317.2118633735. The cubic root of 28272742 is about 304.6416718117.

The spelling of 28272742 in words is "twenty-eight million, two hundred seventy-two thousand, seven hundred forty-two".